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Headwalls
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Headwalls for watercourse outfalls, culverts and drainage infrastructure. Precast concrete, GRP and HDPE units for pipe entries to rivers, ditches, SuDS ponds and coastal defences. Options for flap valves, penstocks, trash screens, toe aprons, handrails and access steps. Functions: erosion protection, bank stabilisation, hydraulic control, asset protection and safe maintenance.
SponsoredNew Mitred Headwall Range
Althon mitred headwalls for pipework up to and including 600mm are fibre reinforced precast concrete open inlets allowing surface water runoff to enter SUDS features, or to act as an outlet or overflow. The profile of the inlet 1:3 (18 Degrees) is the same as the surrounding ground in accordance with guidelines for the construction and adoption of- NEWS
Althon
Headwalls - helping you find the best solution for your project.
SFA concrete headwalls with precast steps
Althon SFA Headwalls with Precast Steps are precast concrete headwalls designed for Sewers for Adoption compliance, integrating precast steps, outfall safety grilles, and galvanised steel handrailing with gated access. Made to suit various pipe diameters and types, these headwalls can include fixings for gratings, trash screens, flap valves
Two piece heavy duty silt trap inlet
Althon 2 Piece Heavy duty silt Traps are sturdy structures for use on large diameter pipes and are ideally suited for use in water courses with high velocities of water flow. Althon provide as standard with each unit a galvanized weed screen and removable centre panel for access to the silt for cleaning. Lifting points are cast into the wingwalls
H10C headwall range, 1250/1650/2130 backwall height
The H10C headwall is a one-piece structure for plastic, clayware or PCC pipes up to 900mm: available with 3 standard backwall heights; lifting points for safe handling; stainless steel sockets for attaching gratings; brackets for anchorage system. Backwall heights 1250mm, 1650mm and 2130mm Toe depth Toe extension pieces for overall depth of 710 or
Splayed Wing Wall Headwalls
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
400 Mitred Headwall - precast concrete outfall for 400mm drainage pipes
Althon 400 Mitred Headwall is a fibre reinforced precast concrete open inlet for surface water runoff, suitable for pipework up to 375mm and 400mm internal diameter, with a 1:3 (18°) mitred profile matching swale and pond slopes, and supplied with a galvanised steel straight bar grating: fibre reinforced precast concrete headwall for 375mm and
450 Mitred Headwall - precast concrete drainage inlet for 450mm pipes
Althon 450 Mitred Headwall is a fibre reinforced precast concrete open inlet for surface water runoff, designed for pipework up to 450mm internal diameter. Inlet profile matches a 1:3 (18°) slope for swales and ponds, with a galvanised steel straight bar grating as standard and optional inline non-return valve: fibre reinforced precast concrete
H20C headwall range, backwall heights 1.25/1.65/2.13m
The H20C culvert headwall is a sectional structure with rebated joint that is assembled on site around the drainage pipe. It is suitable for plastic or clayware pipes up to 1650mm or PCC pipes up to 1500mm. Available with Standard, Horizontal or Chamfered Wingwalls and with 3 standard backwall heights
Concrete-filled bagwork for headwalls
SoluForm concrete-filled bagwork can be used to build headwalls. The bags are simple to use and can be placed by hand, either pre-soaked or hydrated in situ. The adaptable nature of the system allows for construction in various different situations, letting personnel on site work around obstacles and install in hard to access areas
H50C headwall, backwall height 815
A one piece concrete headwall to suit pipes up to 600mm internal diameter. These headwalls can be used when the ditch bank is very shallow approx 1:3.3 They can be provided with fixings for grating, flap valves or with a full length sloped grating. Max Pipe Opening PCC 525 Max Pipe Opening Plastic / Clayware 600 Backwall Height 815 Approx Headwall
SFA15 C headwall, backwall height 2000
SFA15 C precast concrete headwall for connecting pipework discharging into open watercourses. Sewers for Adoption compliant. Pipework up to 1200mm. Backwall height 2000mm
H42C headwall range, 1120 - 2340 backheight range
The H42C is a one-piece reinforced concrete headwall available in three widths and five standard heights. Particularly suitable for steep embankments. Due to the relatively narrow footprint of the unit (back to front) it is advisable to fit suitable brackets to attach ground anchors up to 750mm pipework; backwall heights 1120mm to 2340mm; suitable
Concrete headwalls with Tideflex valves
Althon manufacture concrete headwalls with Tideflex duckbill valves. The duckbill valves are factory fitted to precast headwalls ensuring they fit properly every time and reducing installation time on site. Multiple duckbill valves can be fitted to a single headwall if required. The Tideflex duckbill check valve prevents backflow
Standard precast concrete headwalls
Althon standard precast concrete headwalls are designed for connecting drainage pipes to open watercourses. The range accommodates pipe sizes up to 2100mm, with options for multiple pipe openings and custom pipe positions. Factory-fitted accessories and compliance with UK water authority guidelines distinguish this product range
SFA15 A headwall, backwall height 1300
SFA15 A precast concrete headwall for connecting pipework discharging into open watercourses. Sewers for Adoption compliant. Pipework up to 750mm. Backwall height 1300mm
SFA20 A headwall, backwall height 1300
SFA20 A precast concrete headwalls are designed to comply with Sewers for Adoption guidelines for pipework discharging into open watercourses for plastic, clay or concrete pipework up to 750mm: up to 750mm Pipework; 1300mm Backwall Height; SFA Compliant. Max Pipe Opening PCC 675, Max Pipe Opening Plastic / Clayware 750, Backwall Height 1300 Approx
Swale Inlet Headwall Range - precast concrete swale and pond inlet
Althon Swale Inlet headwalls are made from fibre reinforced precast concrete and designed for open inlets up to 300mm. They allow surface water runoff to enter SUDS features like swales and ponds, or to act as an outlet or overflow. Units have a 1:3 (18°) profile to match surrounding ground and include side recesses for secure installation on
ACO SuDS swale inlet unit
The ACO SuDS Swale Inlet offers a visually appealing solution for linking proprietary drainage systems to vegetated features such as: swales; basins; ponds; water Courses; rain Gardens. Unlike traditional in-situ concrete structures, the low-profile inlet blends naturally with its surroundings, enhancing the environment rather than disrupting it
SFA27 C headwall, backwall height 2000
SFA27 C precast concrete headwalls are designed to comply with Sewers for Adoption guidelines for pipework discharging into open watercourses for concrete pipework up to 1350mm and plastic / clay pipework up to 1500mm: up to 1500mm Pipework; 2000mm Backwall Height; SFA Compliant. Max Pipe Opening PCC 1350 Max Pipe Opening Plastic / Clayware 1500
500 Mitred Headwall - precast concrete inlet for 500mm drainage pipes
Althon 500 Mitred Headwall is a fibre reinforced precast concrete headwall for pipework up to 500mm internal diameter, designed to manage surface water runoff into SUDS features or act as an outlet or overflow. Inlet profile matches a 1:3 (18°) slope for swales and ponds, with straight bar galvanised steel grating as standard: fibre reinforced
Sloped Trash Screen 60 Degrees
Trash screens made from galvanised mild steel or stainless steel, to fit pipework up to 1500mm. Screens have a 60-degree rake, with 40 x 10mm or 50 x 12mm flats, spaced at 75mm or 100mm centres. Designed for use with precast, in-situ, or brick headwalls and outfalls: sloped trash screens for pipework up to 1500mm with a 60-degree angle; made from
Rectangular Sewers for Adoption (RSFA) Headwalls
Althon manufacture rectangular Sewers for Adoption (RSFA) precast concrete headwalls, for outfalls discharging into ponds, swales, ditches, beaches, and rivers. Compliant with Sewers for Adoption standards and Severn Trent Water STD6002 for pipework up to 600mm. Options for toe thickness, wall profile to suit bank gradients, and can be supplied
R18A Rectangular Headwall Range - precast single piece concrete headwalls
R18A rectangular, single-piece concrete headwalls have a separate toe extensions and can accommodate twin-wall, uPVC or clay pipes up to 600mm, or concrete pipes up to 525mm. Available with 1080mm back wall heights; 3 depths of toe in 300 and 500mm thickness; fixed to the headwall using threaded rod, nuts and washers, and high-strength, non-shrink
SFA27 A headwall, backwall height 1300
SFA27 A precast concrete headwall for connecting pipework discharging into open watercourses. Sewers for Adoption compliant. Pipework up to 675mm for PCC pipework and 750mm for plastic and clayware pipework. Backwall height 1300mm
Angled precast concrete headwalls
Althon's concrete angled headwalls are often specified where the outfall is on a bend and the water needs to flow from the headwall at an appropriate angle to the watercourse. 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. Althon cast the openings
