Suppliers of: Headwalls, precast concrete Headwalls, SFA Headwalls, RSFA Headwalls, Angled Headwalls, rectangular Headwalls, splayed wing Headwalls, Swale Inlet Headwalls, Drainage Channels, linear drainage, slot drainage, heavy duty drainage channels
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.
BIM Files available to download
Althon has an extensive range of BIM files covering all types of Headwalls. Please click here to access their BIM Library
Main Products & Services:
Precast concrete headwalls offer a cost effective alternative to in-situ structures for pipework & concrete box culverts discharging into open watercourses such as rivers, ditches, ponds, swales and tidal environments. Althon have the largest range of precast concrete outfalls & spillways available in the UK, with models that meet Sewers for Adoption guidelines, a range of rectangular models conforming to Severn Trent Water specifications with an array of wingwall profiles, backwall widths and heights as well as being able to offer bespoke precast outfall and wingwall solutions.
Althon Sewers for Adoption precast headwalls should be used when part of a Section 104 Agreement and the sewers are to be adopted once completed by the local Water Company. The materials used and installation must comply with the ‘Sewers for Adoption’ guidelines. Althon precast concrete outfalls offer a cost effective alternative to in-situ structures for connecting pipework discharging into open watercourses.
The Althon headwall specifier has been designed to help you select the most appropriate headwall for your project. Once you have found the right product model for your project you can download CAD and PDF files of your headwall complete with all relevant accessories as well as brochures and datasheets.
Althon Rectangular Precast Headwalls are Sewers for Adoption compliant precast concrete headwalls for outfalls discharging into ponds, swales, ditches beaches and rivers. RSFA precast headwalls come with the option of two thicknesses of toe, 300mm and 500mm, each of which is available in three depths. Althon manufacture RSFA precast headwalls with three different wall profiles to suit the gradient of the bank as follows 1 : 1 slope, 1 : 2 slope and 1 : 3 slope. RSFA precast concrete headwalls are typically supplied complete with Kee Klamp® Handrail to the back wall and horizontal sections of the wing walls, a galvanised steel access ladder and a self-closing gate with padlock facility above.
Angled precast headwalls allow pipework entering a watercourse at an angle to be accommodated or for an outfall to be situated on a bend in a river. We cast the openings in our headwalls to suit your pipe diameter and material. We will also set the invert level of the pipe into the concrete headwall to your specification if required. We can also cast in multiple pipe openings if required.
Althon offer a large range of rectangular precast concrete headwalls for pipework discharging into ponds, swales ditches, rivers and tidal environments. Our rectangular headwalls are available in a range of backwall widths and heights for pipework up to 750mm.
Our precast headwalls for culverts offer a Cost Effective alternative to in-situ structures for connecting Pipework discharging into Open Watercourses. All Drainage pipes discharging into Open Watercourses, such as Swales, Ditches, Ponds and Rivers, should be fitted with an appropriate Althon Headwall. Althon Headwall units can be Pre-Fitted with a Range of Accessories such as Flap Valves, Penstocks, Kee Klamp Handrails and a selection of Gratings dependant on application.
Althon precast headwalls can be supplied to site with factory fitted penstocks. As standard we offer penstocks fitted to our headwalls to suit pipework from 100 up to 1500mm. When required we can offer bespoke sized penstocks or headwalls to accommodate penstocks.
Althon SP ‘Splayed Wing Wall Headwalls’ are precast headwalls produced with a higher wing walls at the front of the apron. SP precast headwalls are for inlets or outlets situated in locations with high or steep embankments or where the structure is required to provide protection to an accessory such as a flap valve, duck bill valve, stop logs or weir wall. Althon SP precast concrete headwalls offer a cost effective alternative to in-situ structures for connecting pipework discharging into open watercourses.
Althon offer precast concrete Sewers for Adoption compliant headwalls complete with precast concrete steps. Typically our precast headwalls with steps will be supplied with an appropriate Sewers for Adoption compliant outfall safety grille and galvanised steel Kee Klamp® handrailing with gated access.
Althon channel drainage range of surface water drainage products caters for all types of construction site circumstances. Products include concrete slot drainage channels, GRP drainage channel, polymer concrete drainage channel and concrete drainage channels. Althon’s drainage channel products have been developed to be lightweight, easy to transport and quick to install and maintain. The Althon linear drainage channel range has been optimised for stability, discharge capacity and longevity for a range of applications and load classes, from A15 through to F900. We offer drainage channels for use in residential environments through to heavy industrial applications such as docks and airports.
Further Technical information is available to download from the BPi Download Library or from the Manufacturer’s own website.
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.
Precast concrete chamber with factory fitted penstock and actuator
Althon precast concrete penstock manhole chambers are cast to order to suit any pipe openings and invert levels required. The benefit of using one of our concrete penstock manhole chambers is that we factory fit accessories to the unit prior to delivery to site. We can factory fit the penstock and actuator instead of manually using a spindle and T-Key if required.
For more information on our range of chambers visit the Precast concrete chamber section of our website or call us on 01603 488700