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CONSTRUCTION DIRECTORY
Althon Limited
Althon Limited Contact Details
Address
MAG Group Building
Vulcan Road South
Vulcan Road South
Norwich
Norfolk
NR6 6AF
England UK
About Althon Limited
Althon Precast Headwalls and Water Management
Althon Ltd manufacture and distribute specialist water management products to the construction industry.
We design and manufacture precast concrete headwalls to meet Sewers for Adoption and Severn Trent Guidelines. Our product range includes flap valves, penstocks and stop logs as well as trash screens and outfall safety grilles. Althon also manufacture precast concrete penstock chambers and offer a large range of commercial and industrial application drainage channels.
Precast Concrete Headwalls
Althon precast concrete headwalls offer a cost effective alternative to in-situ headwalls pipework discharging into attenuation ponds, rivers, ditches, swales and tidal environments. We have ranges of Sewers for Adoption 7th Ed. and Severn Trent Water specification compliant headwalls. We offer a range of factory fitted accessories on our headwalls such as flap valves, penstocks, Kee Klamp® handrails, baffle blocks as well as gratings and trash screens.
- Precast Concrete Headwalls
- Headwall Specifier
- Standard Precast Concrete Headwalls
- Sewers for Adoption (SFA) Headwalls
- Rectangular Precast Headwalls
- Rectangular SFA Headwalls
- Angled Precast Headwalls
- Culvert Precast Headwalls
Flow Control & Flood Prevention
Althon offer a range of specialist water management and flood prevention products such as HDPE flap valves, ductile iron flap valves, penstocks, Wastop inline non-return valves, stop logs, Tideflex duckbill and Checkmate valves. We offer flanged, wall mounted and tidal flap valves as well as wall mounted and inline penstocks.
We can factory fit most of these products to our precast headwalls or precast inspection chambers if required.
- Penstocks
- Flap Valves
- Wastop Inline Non Return Valves
- Hand Stop Gate
- Stoplogs
- Manhole Pipe Safety Chains
- Orifice Plates
- Tideflex Valves
Drainage Channel Range
The Althon drainage channel range of surface water channel drainage products caters for all types of construction sites from car parks to airports and docks. Our drainage channels cater for applications from A15 – F900 load classes.
- High Capacity Drainage Channel
- Polymer Concrete Drainage Channel
- GRP Lightweight Drainage Channel
- Light / Medium Duty Drainage Channel
SFA Outfall Safety Grilles, Trash Screens
Althon offer a comprehensive range of Sewers for Adoption, Sewers for Scotland and UU specification gratings, 45 and 60 degree sloped trash screens with the option for side returns and circular pipe mounted gratings.
We also have a range of precast concrete chambers for housing factory fitted penstocks and precast concrete end walls with fitted penstocks or flap valves.
- Sewers For Adoption Outfall Safety Grilles
- Sloped and Circular Trash Screens and Gratings
- Precast Concrete Penstock Manhole Chambers
- Precast Concrete Penstock Endwalls
Althon Ltd are part of the MAG Group of Companies
MAG Group Limited is a privately owned UK based business operating since 1982. MAG Group has 6 subsidiary companies concentrating on the manufacture and supply of specialist products for the construction industry and retail markets.
We employ around 70 people and have a customer base throughout the UK and worldwide having traded in over 50 countries to date. MAG Group Limited anticipates significant growth in 2018 with Group turnover set to exceed £17 million.
If you have any more questions or enquiries please Contact Us
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04/06/2024
Circular Pipe Mounted Gratings
When you don't have a flat surface to fix to we can fabricate a hinged lockable pipe mounted grating. Ideal for bagwork or vegetated headwalls and made to suit your pipe diameter. Available in both galvanised and stainless steel
The gratings in the photos have been installed at a Wildlife Park in Suffolk ?? ?? ?? ?? ??
For more information please contact our sales team by emailing sales@althon.co.uk or call us on 01603 488700
The gratings in the photos have been installed at a Wildlife Park in Suffolk ?? ?? ?? ?? ??
For more information please contact our sales team by emailing sales@althon.co.uk or call us on 01603 488700
30/04/2024
SFA Inlet and Outlet Headwalls
??? We have just launch a new section to our website for SFA Inlet and Outlet headwalls
?? All of our Sewers for Adoption (SFA) headwalls fully comply with the Design and Construction Guidance for foul and surface water sewers offered for adoption under the Code for adoption agreements for water and sewerage companies operating wholly or mainly in England, Sewerage Sector Guidance (SSG) Part C.
?? Compliance includes wall thickness, depth and thickness of toe options, back wall width to accept correctly sized outfall safety grille & wing wall profiles to suit bank slope.
?? Our headwalls are designed to BS EN 1992-1-1 & manufactured to BS EN 15258:2008 precast concrete products – Retaining wall elements. They are also covered by Factory Production Control certificate number: 0086-CPR-650448 which means they are UKCA marked.
??? For Inlet headwalls with a sloped spillway please visit here
??? For Outlet headwalls with a flat spillway please visit here
?? All of our Sewers for Adoption (SFA) headwalls fully comply with the Design and Construction Guidance for foul and surface water sewers offered for adoption under the Code for adoption agreements for water and sewerage companies operating wholly or mainly in England, Sewerage Sector Guidance (SSG) Part C.
?? Compliance includes wall thickness, depth and thickness of toe options, back wall width to accept correctly sized outfall safety grille & wing wall profiles to suit bank slope.
?? Our headwalls are designed to BS EN 1992-1-1 & manufactured to BS EN 15258:2008 precast concrete products – Retaining wall elements. They are also covered by Factory Production Control certificate number: 0086-CPR-650448 which means they are UKCA marked.
??? For Inlet headwalls with a sloped spillway please visit here
??? For Outlet headwalls with a flat spillway please visit here
27/03/2024
Great Yarmouth's Herring Bridge Project
In 2023, Althon supplied a number of precast concrete headwalls, to Great Yarmouth’s Third River Crossing (Herring Bridge). All of these headwalls were made to order, and the majority of these were supplied with fitted accessories such as Kee Klamp Handrail, HDPE Non return Flap Valves, and Pond Liner Brackets at our customer’s request. One of the benefits of opting for pre fitted accessories, means there is less time spent on installation; saving valued time for contractors.
We offer an impressive range of headwalls, flow control and flood prevention products to choose from and can deliver throughout the United Kingdom on our FORS registered lorries.
Please get in touch with our sales team who would be pleased to assist you with your enquiry. email sales@althon.co.uk or call us on 01603 488700
We offer an impressive range of headwalls, flow control and flood prevention products to choose from and can deliver throughout the United Kingdom on our FORS registered lorries.
Please get in touch with our sales team who would be pleased to assist you with your enquiry. email sales@althon.co.uk or call us on 01603 488700
11/03/2024
Factory fitting accessories to our precast concrete headwalls
Althon are able to pre-fit a wide range to accessories to our precast concrete headwalls, this means the concrete does not have to be drilled on site. Saving time on the installation and has great health and safety benefits.
Wherever possible we will deliver our headwalls with all factory fitted accessories still attached for faster offload and installation.
?? Flap Valves
?? Penstocks
?? Gratings, Outfall Grilles and Trash Screens
?? Kee Klamp, Gates, Ladders and Catwalks
?? Dissipation Blocks
?? Stepped Baffle Blocks
?? Cascade Panels
?? Tideflex Duckbill Valves
?? Orifice Plates
?? Stop Logs
?? V Notch Weir
?? Pond Liner Brackets
?? Dovetails Slots for Cladding
Wherever possible we will deliver our headwalls with all factory fitted accessories still attached for faster offload and installation.
?? Flap Valves
?? Penstocks
?? Gratings, Outfall Grilles and Trash Screens
?? Kee Klamp, Gates, Ladders and Catwalks
?? Dissipation Blocks
?? Stepped Baffle Blocks
?? Cascade Panels
?? Tideflex Duckbill Valves
?? Orifice Plates
?? Stop Logs
?? V Notch Weir
?? Pond Liner Brackets
?? Dovetails Slots for Cladding
05/03/2024
10 years of manufacturing precast concrete inspection chambers
The Althon range of Chieftan precast concrete inspection chambers has been designed to make installation on-site as straightforward as possible. Each inspection chamber comes in two halves with a reinforced cover slab. The units are cast to order to suit any pipe openings and invert levels required. The real benefit of using a Chieftan concrete inspection chamber is in the ability to pre-fit accessories to the unit prior to delivery to site.
29/11/2023
CHAS Certificate 2023/2024
We are delighted to share that Althon has been awarded CHAS accreditation for this coming year, after demonstrating compliance with the CHAS standard in line with the requirement of SSIP Core Criteria and UK H&S Legislation.
CHAS stands for The Contractors Health and Safety Assessment Scheme. Being an approved CHAS Principal Contractor demonstrates that we comply with important health and safety legislation.
We are delighted that our submission was deemed compliant with the CHAS standard.
Well done to everyone involved in making this happen!
CHAS stands for The Contractors Health and Safety Assessment Scheme. Being an approved CHAS Principal Contractor demonstrates that we comply with important health and safety legislation.
We are delighted that our submission was deemed compliant with the CHAS standard.
Well done to everyone involved in making this happen!
15/11/2023
New H6C Headwalls
We have recently expanded our range of H6C headwalls, this now includes 3 new headwalls with level wing walls.
The new headwalls come in external backwall heights of 1100mm, 1550mm and 2050mm. All the headwalls in this range are designed to suit plastic or clay pipes up to 600mm and concrete pipes up to 450mm.
For more information on the H6C range of headwalls visit our website, email sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
The new headwalls come in external backwall heights of 1100mm, 1550mm and 2050mm. All the headwalls in this range are designed to suit plastic or clay pipes up to 600mm and concrete pipes up to 450mm.
For more information on the H6C range of headwalls visit our website, email sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
16/10/2023
Local headwalls in Norfolk
We have recently supplied several headwalls to Great Yarmouth’s third river crossing know as Herring Bridge. We have supplied several headwalls with factory fitted pond liner brackets, HDPE/SS Flap Valves and also kee klamp handrail. Having accessories factory fitted saves time on installation and has great health and safety benefits.
For more information on the range of headwalls we offer please visit our website, email sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
For more information on the range of headwalls we offer please visit our website, email sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
04/07/2023
Heavy Duty Drainage Channel
Althon is now supplying a new heavy duty traffic drain which is an eco-friendly F900 load class drainage channel.
These are lighter than the comparable concrete channels making them considerably easier to install. It is a monolithic channel so there is no separate grating making it ideal for heavy traffic loadings.
For more information please visit our website, call us on 01603 488700 or email sales@althon.co.uk
These are lighter than the comparable concrete channels making them considerably easier to install. It is a monolithic channel so there is no separate grating making it ideal for heavy traffic loadings.
For more information please visit our website, call us on 01603 488700 or email sales@althon.co.uk
03/07/2023
Coloured precast concrete headwalls
Althon are now able to offer coloured headwalls for aesthetically sensitive areas. Our coloured concrete headwalls can help the installation blend into the surrounding landscape.
Althon use a colouring additive for cementitious materials. It provides a uniform streak free colour.
Colours shown are approximations of our colour mix in a typical concrete using mid grey Portland cement and having an as-cast surface. The final colour is affected by many influences.
For more information on our new coloured headwalls please visit our website or email us sales@althon.co.uk
Althon use a colouring additive for cementitious materials. It provides a uniform streak free colour.
Colours shown are approximations of our colour mix in a typical concrete using mid grey Portland cement and having an as-cast surface. The final colour is affected by many influences.
For more information on our new coloured headwalls please visit our website or email us sales@althon.co.uk
25/05/2023
Stainless Steel Mammal Shelves
Althon have recently supplied 22 meters of stainless steel mammal ledge to a project in Cheshunt. This project also required some bespoke sections to be designed to fit around the existing concrete structure.
Adding mammal ledges allows wildlife to pass through a culvert or under bridges more safely and therefore reduces the risk of drowning.
For more information on our range to mammal shelves and ledges please visit our website or email us sales@althon.co.uk
Adding mammal ledges allows wildlife to pass through a culvert or under bridges more safely and therefore reduces the risk of drowning.
For more information on our range to mammal shelves and ledges please visit our website or email us sales@althon.co.uk
22/05/2023
Coloured Precast Concrete Headwalls
Althon are now able to offer coloured headwalls for aesthetically sensitive areas. Our coloured concrete headwalls can help the installation blend into the surrounding landscape. We offer a range of colours and shades. Should you require coloured headwalls we would be happy to discuss your requirements with you and help with any specification queries. Email sales@althon.co.uk or call us on 01603 488700.
17/05/2023
Bitumen waterproofing on headwalls
We have recently supplied several headwalls to a project on the A5 in Leicestershire. The specification called for two coats of bitumen waterproofing to be applied to all buried surfaces. The bitumen waterproofing was applied at the factory allowing the Headwall to be lifted directly into place on site without the need for any additional work to be carried out. We can add bitumen waterproofing to any of our precast concrete headwalls if required and for more information on the range of headwalls we offer please visit our website https://www.althon.co.uk/products/headwalls/
11/04/2023
Avonmouth Headwalls
We have recently supplied several of our precast concrete headwalls fitted with Kee Klamp® handrails and a mesh infill. The mesh infill helps to provide extra security in the handrail and we can add this to any of our existing galvanised handrail options.
For more information on the different types of headwalls we offer please visit our website https://www.althon.co.uk/products/headwalls/ , email sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
For more information on the different types of headwalls we offer please visit our website https://www.althon.co.uk/products/headwalls/ , email sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
04/04/2023
New AH8C and AH9C headwall ranges
We are pleased to announce we have two new ranges of precast concrete headwalls. The AH8C and AH9C angled headwall ranges allow the water to discharge at 90 degrees to the waterflow or body of water. If specified with the correct sized toe the AH8C headwalls meets Sewerage Sector Guidance (SSG). The range is available with two back wall height and two toe thickness options each with three depth options.
For more information on this range of headwalls please visit here or if you cannot find what you are looking for, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
For more information on this range of headwalls please visit here or if you cannot find what you are looking for, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
29/03/2023
Flap Valves
What are Flap Valves?
Flap valves and flap gates are a type of non-return valve (NRV) used to prevent flooding and to stop water back-flowing up pipework connecting into ponds, ditches, swales, rivers and marine or tidal environments.
What type do you offer?
Our range of flap valves and flap gates includes wall mounted flap valves, tidal flap valves, flange mounted flap valves as well as push fit and pipe mounted flap valves. As standard our HDPE flap valves have a 50 year design life. Althon HDPE flap valves can be manufactured to suit site specific installation requirements and operating water pressures.
Can I have a flap valve factory fitted to an Althon Headwall?
Yes! Althon flap valves can be factory fitted to our precast concrete headwalls and chambers. For installation on site by others we supply a EPDM seal, stainless steel fixings and chemical anchors.
Flap valves and flap gates are a type of non-return valve (NRV) used to prevent flooding and to stop water back-flowing up pipework connecting into ponds, ditches, swales, rivers and marine or tidal environments.
What type do you offer?
Our range of flap valves and flap gates includes wall mounted flap valves, tidal flap valves, flange mounted flap valves as well as push fit and pipe mounted flap valves. As standard our HDPE flap valves have a 50 year design life. Althon HDPE flap valves can be manufactured to suit site specific installation requirements and operating water pressures.
Can I have a flap valve factory fitted to an Althon Headwall?
Yes! Althon flap valves can be factory fitted to our precast concrete headwalls and chambers. For installation on site by others we supply a EPDM seal, stainless steel fixings and chemical anchors.
01/03/2023
SFA15 Headwall Installation
Some great installation images we have been sent from a project in Wales. This is one of our SFA15C precast concrete headwalls complete with Toe beam, 3 Sided Kee Klamp, gate, ladder and a walkthrough. All the metal work is factory fitted so need for drilling the headwall on site making installation much faster and safer.
If you would like any more information on our range of Sewerage Sector Guidance compliant headwalls please visit our website email us sales@althon.co.uk or call us on 01603 488700.
If you would like any more information on our range of Sewerage Sector Guidance compliant headwalls please visit our website email us sales@althon.co.uk or call us on 01603 488700.
07/12/2022
Aluminium Stop logs on headwalls
Althon have recently supplied 10 precast concrete headwalls to Radyr, Wales for the A4119 project.
All of the headwalls required factory fitted accessories such a kee klamp handrail, gratings and aluminium stop logs. Having the accessories factory fitted saves time on installation and has great health and safety benefits.
For more information on our precast concrete headwalls please visit the headwalls section of our website, call our sales team on 01603 488700 or email sales@althon.co.uk
All of the headwalls required factory fitted accessories such a kee klamp handrail, gratings and aluminium stop logs. Having the accessories factory fitted saves time on installation and has great health and safety benefits.
For more information on our precast concrete headwalls please visit the headwalls section of our website, call our sales team on 01603 488700 or email sales@althon.co.uk
05/12/2022
Our SFA headwall range is 8 years old!
The Sewers for Adoption headwall range was launched 8 years ago and is still one of our bestselling ranges of precast concrete headwalls.
The headwalls are compliant with Sewerage Sector Guidance and should be used as part of a section 104 agreement when the sewers are to be adopted once completed by the local water company. These headwalls can fit up to and including a 1800mm ID pipe, for more information on the different sizes of headwalls please visit our website https://www.althon.co.uk/products/sewers-for-adoption-sfa-headwalls/
The headwalls are compliant with Sewerage Sector Guidance and should be used as part of a section 104 agreement when the sewers are to be adopted once completed by the local water company. These headwalls can fit up to and including a 1800mm ID pipe, for more information on the different sizes of headwalls please visit our website https://www.althon.co.uk/products/sewers-for-adoption-sfa-headwalls/
09/11/2022
Cryddan Brook Headwall
Althon have recently supplied a bespoke precast concrete headwall to Cyrddan Brook. The headwall needed to be rectangular and accommodate a 1050mm ID PCC pipe. We were able to design a suitable headwall plus factory fit Kee Klamp handrail and a cranked grating complete with catwalk, this made installation much faster and safer.
We have an extensive range of headwalls on our website but if you cannot find what you are looking for please use our design form, email us sales@althon.co.uk or call us on 01603 488700.
We have an extensive range of headwalls on our website but if you cannot find what you are looking for please use our design form, email us sales@althon.co.uk or call us on 01603 488700.
01/11/2022
Headwalls in attenuation ponds
Balancing ponds or attenuation ponds are a vital flood prevention method. You will often see these attenuation ponds complete with headwalls, on new construction projects such as housing estates, new roadways etc. The purpose of them is during heavy or prolonged wet weather the drainage system on new construction projects can be overwhelmed due to the sheer amount of excess water being discharged. The attenuation pond is designed to control the amount of excess water entering the drainage system to reduce the likelihood of flooding.
The headwalls in the photos we have factory fitted one with a close coupled grating and the other with a penstock which can control and isolate water, cranked grating over the valve and 3 sided kee klamp for fall protection.
For more information on our range of headwalls please visit our website https://www.althon.co.uk/products/headwalls/
The headwalls in the photos we have factory fitted one with a close coupled grating and the other with a penstock which can control and isolate water, cranked grating over the valve and 3 sided kee klamp for fall protection.
For more information on our range of headwalls please visit our website https://www.althon.co.uk/products/headwalls/
05/09/2022
Extra Large SFA headwall
A recently cast SFA headwall with extension pieces added to make it wider. This headwall is made to suit 2 x 1800mm concrete pipes and is currently being factory fitted with an SFA hinged and lockable outfall grating. It also has a separate toe beam and Kee Klamp handrail will be factory fitted before it arrives on site.
For more information on our precast concrete headwalls please visit the headwalls section of our website, call our sales team on 01603 488700 or email sales@althon.co.uk
For more information on our precast concrete headwalls please visit the headwalls section of our website, call our sales team on 01603 488700 or email sales@althon.co.uk
30/08/2022
Cladding precast concrete headwalls
We have recently supplied several splayed and rectangular precast concrete headwalls with dovetail slots, flap valves and gratings for a project in Horsham. When a client wishes to clad our precast concrete headwalls and they also require factory fitted accessories we simply still predrill the headwalls with the fixing points and then supply site with longer fixings making installation much safer and faster.
All the headwalls have now been installed and cladded by site and we think the finished result looks great.
For more information on our precast concrete headwalls please visit the headwalls section of our website, call our sales team on 01603 488700 or email sales@althon.co.uk
All the headwalls have now been installed and cladded by site and we think the finished result looks great.
For more information on our precast concrete headwalls please visit the headwalls section of our website, call our sales team on 01603 488700 or email sales@althon.co.uk
25/07/2022
Level Invert on Headwalls
The photo below is one of our smaller RSFA headwalls (RSFA18B 01 1150) showing a great example of when a customer requires the pipe ID at level invert. We cast in a slightly larger opening than the OD of the pipe to make installation easier on site, once the pipe is in the correct position site will fill the void around the pipe with high strength non shrink grout. The SFA1 Outfall Safety Grille is fitted to the headwall 150mm up from the spillway as standard when the pipe ID is level with the spillway.
For more information on our precast concrete headwalls please visit the headwalls section of our website, call our sales team on 01603 488700 or email sales@althon.co.uk
For more information on our precast concrete headwalls please visit the headwalls section of our website, call our sales team on 01603 488700 or email sales@althon.co.uk
07/07/2022
Bespoke Angled Rectangular Headwall
Here at Althon we have 100’s of different precast concrete headwall options to suit a wide range of pipe sizes and materials. However sometimes you still cannot find the one you need to suit your site requirements, so we are always happy to look at designing a bespoke option for you.
Our latest bespoke headwall being cast in the factory is an angled rectangular headwall factory fitted with pedestrian guardrail, slides for aluminium stop logs and a fixed grating for a box culvert opening. This design suits the clients site requirements and having the accessories factory fitted to a precast concrete structure saves time on site and has great health and safety benefits.
For more information on our precast concrete headwalls please visit the headwalls section of our website, call our sales team on 01603 488700 or email sales@althon.co.uk
Our latest bespoke headwall being cast in the factory is an angled rectangular headwall factory fitted with pedestrian guardrail, slides for aluminium stop logs and a fixed grating for a box culvert opening. This design suits the clients site requirements and having the accessories factory fitted to a precast concrete structure saves time on site and has great health and safety benefits.
For more information on our precast concrete headwalls please visit the headwalls section of our website, call our sales team on 01603 488700 or email sales@althon.co.uk
31/05/2022
Multiple Pipe Openings in Headwalls
We can accommodate multiple pipe openings into ANY of our precast concrete headwalls as long as there is enough space in the backwall or wingwall to do so. All of our precast concrete headwalls are made to order allowing you to choose the size and position the pipe work needs to be.
You can use our Headwall Design Service to find the headwall you require then on request we can provide pricing and design drawings for your chosen headwall showing more than one pipe opening.
For further information please contact our sales team by email sales@althon.co.uk or by phone on 01603 488700.
You can use our Headwall Design Service to find the headwall you require then on request we can provide pricing and design drawings for your chosen headwall showing more than one pipe opening.
For further information please contact our sales team by email sales@althon.co.uk or by phone on 01603 488700.
23/05/2022
NEW R7C Headwall Range
We are pleased to announce we have a new R7C rectangular headwall range which are the ideal option for highways applications. The R7C headwalls for motorways and other road projects can be factory fitted with accessories such as handrails, trash screens, flap valves and penstocks. The headwalls are available in 3 backwall heights and a range of wingwall profiles.
For more information on the range of headwalls please visit https://www.althon.co.uk/products/r7c-headwall-range/ or if you cannot find what you are looking for, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
For more information on the range of headwalls please visit https://www.althon.co.uk/products/r7c-headwall-range/ or if you cannot find what you are looking for, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
22/03/2022
Some great product benefits of our precast headwalls
? Designed to BS EN 1992-1-1 (EC2) standards
? Manufactured to BS EN 15258 & BS EN 13369 standards
? Severn Trent Water specifications for rectangular precast outfalls
? Anglian Water approved headwalls
? Angled ranges that meets the Environment Agency’s ‘Standard rules SR2015 No 27’
? Selected ranges meet the Sewers for Adoption 7th Edition guidelines to be adopted by local Water Authorities & comply with the Water Industry Regulations 2011
? Factory fitted accessories
? Fast and easy to install
? Design life to either 50 or 120 years
For more information on the types of headwalls we offer please visit https://www.althon.co.uk/products/headwalls/or if you cannot find what you are looking for, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
? Manufactured to BS EN 15258 & BS EN 13369 standards
? Severn Trent Water specifications for rectangular precast outfalls
? Anglian Water approved headwalls
? Angled ranges that meets the Environment Agency’s ‘Standard rules SR2015 No 27’
? Selected ranges meet the Sewers for Adoption 7th Edition guidelines to be adopted by local Water Authorities & comply with the Water Industry Regulations 2011
? Factory fitted accessories
? Fast and easy to install
? Design life to either 50 or 120 years
For more information on the types of headwalls we offer please visit https://www.althon.co.uk/products/headwalls/or if you cannot find what you are looking for, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
07/03/2022
Althon Headwall in Iraq
Althon headwall with factory fitted ductile iron flap valve and stainless steel handrail installed in Basra, Iraq.
For more information on the types of headwalls we offer please visit our headwalls section or if you cannot find the headwall you are looking for use our design form, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
For more information on the types of headwalls we offer please visit our headwalls section or if you cannot find the headwall you are looking for use our design form, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
15/02/2022
Custom built GMS cranked grating, mesh catwalk and handrail
At Althon we can offer standard and custom built gratings to suit any of our precast concrete headwalls. All gratings, catwalks and handrails can be custom designed and built to suit any site requirements. The gratings will then be factory fitted to our headwalls to make sure they fit, only being removed for delivery loading/offloading purposes.
The image shows one of our standard RSFA headwalls with a custom built rakeable cranked grating, mesh catwalk for standing on and added handrail for protection. The photo was taken before the metal work had been galvanised.
For more information on our standard headwalls are gratings please visit our website or use our design form, email us sales@althon.co.uk or phone us on 01603 488700 and we will be happy to help with your requirements.
The image shows one of our standard RSFA headwalls with a custom built rakeable cranked grating, mesh catwalk for standing on and added handrail for protection. The photo was taken before the metal work had been galvanised.
For more information on our standard headwalls are gratings please visit our website or use our design form, email us sales@althon.co.uk or phone us on 01603 488700 and we will be happy to help with your requirements.
17/01/2022
Reducing our carbon footprint
In 2021 Althon saved 626 tonnes carbon by using GGBS as cement substitute. We are committed to reducing our carbon footprint and are constantly looking into new products and methods of production and delivery to help us achieve this.
Concrete suppliers and designers, and in turn their clients and customers, can use concrete to minimise carbon footprints by: optimising mix, the efficient use of materials and recognising the carbon uptake potential of concrete to permanently sequester CO2 in buildings. Concrete can also be reused and at end of life is 100% recyclable.
Concrete suppliers and designers, and in turn their clients and customers, can use concrete to minimise carbon footprints by: optimising mix, the efficient use of materials and recognising the carbon uptake potential of concrete to permanently sequester CO2 in buildings. Concrete can also be reused and at end of life is 100% recyclable.
15/12/2021
Headwalls with Orifice Plates
Althon have recently supplied several SFA headwalls (headwalls that are compliant with Sewerage Sector Guidance) factory fitted with bespoke orifice plates. Orifice plates can be manufactured in either galvanized or stainless steel and they are designed to restrict and regulate the flow of water. We can manufacture the orifice plates to suit multiple openings or one opening in any position required on the plate.
In this instance the customer was using a 1200mm ID pipe coming into the back of the headwall and wanted 3No. 73mm, 87mm and 103mm holes in the orifice plate to restrict the flow. We also then added stitch welds to strengthen the plate.
For more information on orifice plates please visit Orifice Plates, email us sales@althon.co.uk or call us on 01603 488700.
In this instance the customer was using a 1200mm ID pipe coming into the back of the headwall and wanted 3No. 73mm, 87mm and 103mm holes in the orifice plate to restrict the flow. We also then added stitch welds to strengthen the plate.
For more information on orifice plates please visit Orifice Plates, email us sales@althon.co.uk or call us on 01603 488700.
13/12/2021
Welded and Powder Coated Handrail
We can factory fit Handrail to any of our precast concrete headwalls and our standard is Galvanised Kee Klamp ® size 8 fittings which complies with Civil Engineering Specification for the Water Industry (CESWI) 7th Edition Clause 2.60 Handrails & Balusters & The Engineering Equipment and Materials Users' Association (EEMUA) Publication 105 7th Edition Factory Stairways, Ladders and Handrails.
However on request we can also make welded handrail which can then be powder coated in any RAL colour that is required. For more information on using a different handrail please email sales@althon.co.uk
However on request we can also make welded handrail which can then be powder coated in any RAL colour that is required. For more information on using a different handrail please email sales@althon.co.uk
06/12/2021
Bespoke headwall and grating
The headwall and grating shown are a bespoke design based on a clients sketch for a project in Downderry, Cornwall. The headwall only required 1 wingwall due to the customer wanting a concrete footpath on the right hand side that the headwall would then butt up against. The trash screen required a working platform for maintenance purposes and is manufactured to BS EN 1090 standards.
For more information on the types of headwalls we offer please visit our headwalls section or if you cannot find the headwall you are looking for use our design form or email us sales@althon.co.uk
For more information on the types of headwalls we offer please visit our headwalls section or if you cannot find the headwall you are looking for use our design form or email us sales@althon.co.uk
22/11/2021
Large RSFA Headwalls
We already have a range of RSFA headwalls which have been designed in accordance with Severn Trent Water Standard details STD6002 for pipework up to 600mm & a back wall height of 1100mm. However, we have had a lot of requests for rectangular headwalls for larger pipe sizes & taller back wall heights. With the increase in height Severn Trent Water require steps for access rather than a ladder. The image below is a recent bespoke headwall we have manufactured to suit a 1200mm PCC pipe, factory fitted with a SFA1 1200 Outfall Safety Grille, Steps and Kee Klamp Handrail. If you require a headwall that you cannot find on our website please contact us by using our design form, email us sales@althon.co.uk or call us on 01603 488700
01/11/2021
Approved Mammal Shelf to be used on HS2
Althon have recently been approved to supply mammal shelves to the Align/ HS2 project.
HS2 projects require the fixings to comply with stringent material specifications which our mammal shelves comply too. To date we have already supplied 42metres of mammal shelves which will help keep the badgers safe.
For more information on our mammal shelves and ledges please visit https://www.althon.co.uk/products/mammal-shelves-ledges/, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
HS2 projects require the fixings to comply with stringent material specifications which our mammal shelves comply too. To date we have already supplied 42metres of mammal shelves which will help keep the badgers safe.
For more information on our mammal shelves and ledges please visit https://www.althon.co.uk/products/mammal-shelves-ledges/, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
21/09/2021
Bespoke Angled Headwall
Althon have recently supplied a large headwall to accommodate a 1500mm ID pipe factory fitted with HDPE flap valves and bespoke sections.
For this project we were able to use one of our standard narrow headwalls with two extension pieces cast on the left hand side to create the angled spillway the customer required.
If you cannot find a design you are looking for please use our Design Service, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
For this project we were able to use one of our standard narrow headwalls with two extension pieces cast on the left hand side to create the angled spillway the customer required.
If you cannot find a design you are looking for please use our Design Service, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
03/11/2020
Althon CPD course now available - 'Specifying the right headwall for your application'
Althon are pleased to announce our new CPD certified course ‘Specifying the right headwall for your application’. The primary focus of the course is to help engineers and specifiers with identifying the correct headwall for their application, including information on where you would use Sewers for Adoption headwalls and how to make sure you are compliant with a section 104 agreement.
The course is also relevant to our Builders’ Merchant client base, to enhance knowledge regarding headwalls and to enable them to assist their customers in depth.
Althon also wish to raise awareness of the different accessories that can be both pre and retro-fitted onto headwalls, to aid with water management. These include flap valves, penstock gates, Wastop and Tideflex valves alongside Kee Klamp hand rails and many more.
The course covers in detail the critical dimensions that you need to know in order to the select the correct headwall and or/accessories. A checklist is provided, so that customers can make sure they’re getting the required details when liaising with clients. This course counts towards continued professional development and a certificate of attendance if available for each delegate.
If you're interested in completing this course please e-mail cpd@althon.co.uk or phone 01603 488700
The course is also relevant to our Builders’ Merchant client base, to enhance knowledge regarding headwalls and to enable them to assist their customers in depth.
Althon also wish to raise awareness of the different accessories that can be both pre and retro-fitted onto headwalls, to aid with water management. These include flap valves, penstock gates, Wastop and Tideflex valves alongside Kee Klamp hand rails and many more.
The course covers in detail the critical dimensions that you need to know in order to the select the correct headwall and or/accessories. A checklist is provided, so that customers can make sure they’re getting the required details when liaising with clients. This course counts towards continued professional development and a certificate of attendance if available for each delegate.
If you're interested in completing this course please e-mail cpd@althon.co.uk or phone 01603 488700
07/08/2020
New Vermin Gratings
Althon have just launched two new Vermin Gratings, the pipe mounted vermin gate in 304 stainless steel and also the vermin mesh grille PN16 flange in 316 stainless steel.
Pipe mounted vermin gates in 304 stainless steel are hinged at the top to allow passage in the direction of flow but will prevent rats and other vermin climbing back up the pipe.
Vermin mesh grilles with a PN16 flange in 316 stainless steel are designed to fit between two flanged pipes or fittings, or at the end of a flanged pipe run to prevent rodents and other vermin entering connecting pipework.
For more information or for pricing please contact our sales team by email sales@althon.co.uk or by telephone on 01603 488700
Pipe mounted vermin gates in 304 stainless steel are hinged at the top to allow passage in the direction of flow but will prevent rats and other vermin climbing back up the pipe.
Vermin mesh grilles with a PN16 flange in 316 stainless steel are designed to fit between two flanged pipes or fittings, or at the end of a flanged pipe run to prevent rodents and other vermin entering connecting pipework.
For more information or for pricing please contact our sales team by email sales@althon.co.uk or by telephone on 01603 488700
17/07/2020
Narrow Headwalls with Large Flap Valves
Althon have recently supplied a large narrow headwall to accommodate two 1200mm ID pipes factory fitted with HDPE flap valves for a project near Glasgow.
For this project we were able to use on of our standard narrow headwalls with an extension piece cast in the middle to create the width the customer required.
We can cast multiple pipe openings into any of our headwalls but if you cannot find a design you are looking for please use our Design Service, email us sales@althon.co.uk or call us on 01603 488700
For this project we were able to use on of our standard narrow headwalls with an extension piece cast in the middle to create the width the customer required.
We can cast multiple pipe openings into any of our headwalls but if you cannot find a design you are looking for please use our Design Service, email us sales@althon.co.uk or call us on 01603 488700
08/06/2020
Mammal Shelves & Ledges
Althon have just launched a new range of mammal ledges in GRP and mammal shelves in HDPE.
Mammal shelves and ledges can be installed on new or existing culverts and allow animals such as badgers, otters and other wildlife to pass through culverts or under bridges reducing the risk of drowning in the culvert or river.
Please visit the https://www.althon.co.uk/products/mammal-shelves-ledges/ section of our website for more information or for pricing please contact our sales team by email sales@althon.co.uk or by telephone on 01603 488700
Mammal shelves and ledges can be installed on new or existing culverts and allow animals such as badgers, otters and other wildlife to pass through culverts or under bridges reducing the risk of drowning in the culvert or river.
Please visit the https://www.althon.co.uk/products/mammal-shelves-ledges/ section of our website for more information or for pricing please contact our sales team by email sales@althon.co.uk or by telephone on 01603 488700
04/06/2020
Certified CPD Member
Althon Limited are pleased to announce that they are now a certified CPD Member. As a company we believe assisting others to continue their lifelong learning journey is a privilege; it enables people from a plethora of backgrounds to increase their knowledge and enhance their professional capabilities. We will be providing a range of courses to enable designers and specifiers to select the correct headwall and accessories for their application. Alongside this, we will be developing relationships with our Builders Merchant partners to enable them to assist our customers further through dedicated training. All courses will be certified for accrual towards individual CPD requirements.
Contact cpd@althon.co.uk for further details or telephone 01603 488700.
Contact cpd@althon.co.uk for further details or telephone 01603 488700.
06/03/2020
Anglian Water Approved Headwalls
Althon Ltd are pleased to announce that their ‘Sewers for Adoption’ range of Headwalls have been approved for use on projects that are to be adopted under a Section 104 agreement by Anglian Water Services Ltd. Althon can advise on the most appropriate product from our range to suit the site requirement. The full range of acceptable Headwalls are available to view drawings and download here. Consultants should specify the particular Headwall they intend to use when making their application allowing Anglian Water Services to review and ensure it is fit for purpose in the location proposed. If you are unable to find a Headwall that meets you specific site requirements we are able to offer modifications to our standard Headwalls or can produce bespoke units, please contact our sales office on 01603 488700 or sales@althon.co.uk for further information.
07/02/2020
Bespoke Headwall at Mauldslie WWTW
Althon have recently supplied a bespoke precast headwall retaining wall at Mauldslie WWTW.
The headwall was manufactured to accommodate multiple pipe openings and to site specific dimensions.
The headwall was offloaded and installed by the contractor within the space of a morning.
If you require a bespoke precast headwall please use the Headwall Design Tool or email sales@althon.co.uk for more information on how Althon can help.
The headwall was manufactured to accommodate multiple pipe openings and to site specific dimensions.
The headwall was offloaded and installed by the contractor within the space of a morning.
If you require a bespoke precast headwall please use the Headwall Design Tool or email sales@althon.co.uk for more information on how Althon can help.
06/01/2020
Headwall Design Tool
Althon have launched a Headwall Design Tool to enable you to specify the headwall you require with associated factory fitted accessories.
We have produced a Headwall Design Request Form where you fill out as much information as possible. We will then send you a CAD & PDF drawing of your chosen headwall and will liaise with you to further refine the design to suit your specific requirements if required.
Headwall accessories include but are not limited to flap valves, penstocks, cascade panels, dissipation blocks, V notch weirs, handrails, gates & ladders.
We have produced a Headwall Design Request Form where you fill out as much information as possible. We will then send you a CAD & PDF drawing of your chosen headwall and will liaise with you to further refine the design to suit your specific requirements if required.
Headwall accessories include but are not limited to flap valves, penstocks, cascade panels, dissipation blocks, V notch weirs, handrails, gates & ladders.
16/12/2019
Headwall Brochure
Althon have released an updated headwall brochure giving a detailed overview of our range of precast headwalls.
The brochure was produced for the FloodExpo 2019 at which Althon exhibited. The brochure not only gives details on our range of concrete headwalls but also our other products such as flap valves, penstocks and drainage channels.
A copy of our new brochure can be downloaded here
The brochure was produced for the FloodExpo 2019 at which Althon exhibited. The brochure not only gives details on our range of concrete headwalls but also our other products such as flap valves, penstocks and drainage channels.
A copy of our new brochure can be downloaded here
10/12/2019
Headwalls with Cascade Panels
Althon have recently manufactured a precast concrete headwall complete with a 8.5m long cascade panel for a project in Sunderland.
You can use the Althon Headwall Specifier to find the headwall you require. Althon can then assist with pricing and design drawings detailing Cascade panesl on our headwall drawings in CAD and PDF
You can also visit the Precast Concrete Headwalls section of the website or call on 01603 488700
You can use the Althon Headwall Specifier to find the headwall you require. Althon can then assist with pricing and design drawings detailing Cascade panesl on our headwall drawings in CAD and PDF
You can also visit the Precast Concrete Headwalls section of the website or call on 01603 488700
20/11/2019
Headwalls with Tideflex Valves
Althon can manufacture concrete headwalls with Tideflex duckbill valves. We factory fit the duckbill valves to our precast concrete headwalls ensuring they fit properly and reducing installation time on site. Factory fitting duckbill valves to headwalls also means the headwalls do not have to be drilled on site which has great health and safety benefits.
You can the Althon Headwall Specifier to find the headwall you require. Althon can then assist with pricing and design drawings detailing Tideflex valves on the headwall drawings in CAD and PDF
You can also visit the Precast Concrete Headwalls section of Althon's website or call us on 01603 488700
You can the Althon Headwall Specifier to find the headwall you require. Althon can then assist with pricing and design drawings detailing Tideflex valves on the headwall drawings in CAD and PDF
You can also visit the Precast Concrete Headwalls section of Althon's website or call us on 01603 488700
14/05/2019
Headwall BIM Objects
Althon have just launched BIM objects available to download from the Headwalls section of the website in .rfa .ifc and .adsk other file types available on request.
If you cannot find the drawing you require in 3D please email sales@althon.co.uk
Visit The Althon Headwalls Website
If you cannot find the drawing you require in 3D please email sales@althon.co.uk
Visit The Althon Headwalls Website
22/03/2019
Sewers For Adoption Headwalls For Marina
Althon have recently supplied 2No. SFA27D Headwalls with bolt on toes to suit 1200mm dia concrete pipes to Upton upon Severn Marina.
All Althon SFA headwalls and toes are cast with lifting points for easy and quick offloading, transporting and installing into their final position. No need for any specialised lifting equipment just standard lifting hooks are chains are need to move the headwalls and toes.
You can use the Althon Headwall Specifier to find the headwall you require. We can then assist with pricing and design drawings detailing an appropriate headwall.
You can also visit the Precast Headwalls section of our website.
All Althon SFA headwalls and toes are cast with lifting points for easy and quick offloading, transporting and installing into their final position. No need for any specialised lifting equipment just standard lifting hooks are chains are need to move the headwalls and toes.
You can use the Althon Headwall Specifier to find the headwall you require. We can then assist with pricing and design drawings detailing an appropriate headwall.
You can also visit the Precast Headwalls section of our website.
20/03/2019
Precast Headwall Sizes UK's Largest Range
Althon manufacture precast concrete headwalls to suit any pipework. We cast the openings into our headwalls to suit the OD of the specified pipework.
Headwalls can be factory fitted with gratings, flap valves, penstocks, handrails and other accessories.
You can use the Headwall Specifier to find the headwall you require. Althon can then assist with pricing and design drawings detailing an appropriate sized headwall
You can also visit the Precast Concrete Headwalls section of Althon's website
25/10/2018
Box Culvert Headwalls
Althon has new range of precast concrete Box Culvert Headwalls to suit a maximum internal box culvert of 2650mm wide x 1750mm high. All of Althon's CSP Culvert headwalls can be factory fitted with gratings, flap valves, Kee Klamp handrail, penstocks and other flow control devices. Toe depths are also available up to 1000mm and come in thickness of 300 or 500mm.
Please visit the Precast Headwalls for Culverts section of Althon's website for more information or Precast Concrete Headwalls for our entire headwall range. For pricing please contact the Althon Sales Team by email sales@althon.co.uk or by telephone on 01603 488700
Please visit the Precast Headwalls for Culverts section of Althon's website for more information or Precast Concrete Headwalls for our entire headwall range. For pricing please contact the Althon Sales Team by email sales@althon.co.uk or by telephone on 01603 488700
11/09/2017
AH4C Angled Headwalls
AH4C Angled Headwalls
The AH4C Angled headwall has been designed specifically to meet the Environment Agency’s ‘Standard rules SR2015 No 27 –
Constructing an outfall pipe of 300mm diameter through a headwall into a main river & Exempt flood risk activities: environmental permits section FRA12 ‘Outfall pipes less than 300mm diameter through a headwall’. The AH4C allows water to discharge at a 45 Deg. angle, the Environment Agency’s preferred method when discharging into a watercourse. Available with three different back wall heights and a separate Toe in three depth options that ensure not only is it easier to handle but easier to install & more importantly ensures the foundation around the toe and beneath the Headwall structure can be well compacted.
Please visit the Angled Headwall section of our website for more information or for pricing please contact our sales team by email sales@althon.co.uk or by telephone on 01603 488700
The AH4C Angled headwall has been designed specifically to meet the Environment Agency’s ‘Standard rules SR2015 No 27 –
Constructing an outfall pipe of 300mm diameter through a headwall into a main river & Exempt flood risk activities: environmental permits section FRA12 ‘Outfall pipes less than 300mm diameter through a headwall’. The AH4C allows water to discharge at a 45 Deg. angle, the Environment Agency’s preferred method when discharging into a watercourse. Available with three different back wall heights and a separate Toe in three depth options that ensure not only is it easier to handle but easier to install & more importantly ensures the foundation around the toe and beneath the Headwall structure can be well compacted.
Please visit the Angled Headwall section of our website for more information or for pricing please contact our sales team by email sales@althon.co.uk or by telephone on 01603 488700
Products & Services
SFA Headwalls
Standard Headwalls
Angled Headwalls
Precast Concrete Headwalls
Penstocks
Flap valves
SFA Gratings & Trash Screens
Inline non return valves
Tidal flap valves
Concrete chambers
Trash screens
Gratings
Wastop
Wingwalls
Drainage channel
Location Map
Althon Limited Serves The Following Areas
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Althon Limited General Description
Althon specialise in the design, manufacture and distribution of drainage products for the management, treatment, isolation and control of water. Our range of products includes Althon precast concrete headwalls, HDPE, cast iron and stainless steel flap valves, penstocks and stop logs
