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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.
Headwalls - helping you find the best solution for your project.
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
H6C headwall range, 1100-2050mm backwall height
A one-piece reinforced concrete headwall to suit plastic or clayware pipes up to 500mm or PCC pipes up to 450mm. Available with three standard backwall heights, 1.1m, 1.5m and 2m; lifting points cast in to each wingwall for safe handling using Althon lifting clutches; stainless steel sockets provided for the attachment of gratings and
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
H8C headwall range, 1100 / 1500 / 2100 backwall height
A one-piece reinforced concrete headwall to suit plastic or clayware pipes up to 525mm or PCC pipes up to 450mm. Available with three standard backwall heights, 1.1m, 1.5m and 2.1m; lfting points cast in to each wingwall for safe handling using Althon lifting clutches; stainless steel sockets are provided for the attachment of gratings and special
H40C headwall, backwall heights 1120 - 2340
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 600mm pipework; backwall heights 1120mm to 2340mm; suitable for steep
R18B rectangular, single-piece concrete headwalls
R20B rectangular, single-piece concrete headwalls have a separate toe extensions and can accommodate twin-wall, uPVC, concrete or clay pipes up to 750mm. Available with 1300mm 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 grout. Options: gratings; flap valves
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
Precast concrete headwalls
FP McCann precast concrete headwalls are designed as end connection points for outfall pipes discharging into open watercourses. Precast units are intended to reduce the need for on-site shuttering and in-situ concrete work. Their use is suited to locations where access is restricted or where environmental conditions require minimal disruption
Precast concrete headwalls with factory-fitted options
Althon Headwalls are made from precast concrete for connecting pipes, culverts, and box culverts to open watercourses. To prevent erosion, the range includes models for standard, angled, rectangular, and bespoke applications, with options for factory-fitted accessories and compliance with UK water authority standards: precast concrete headwalls
R20B rectangular, single-piece concrete headwalls
R20B rectangular, single-piece concrete headwalls have a separate toe extensions and can accommodate twin-wall, uPVC, concrete or clay pipes up to 750mm. Available with 1300mm 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 grout. Options: gratings; flap valves
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
SFA27 D headwall, backwall height 2350
SFA27 D precast concrete headwalls are designed to comply with Sewers for Adoption guidelines for pipework discharging into open watercourses for concrete pipework up to 1600mm and plastic / clay pipework up to 1800mm: up to 1600 / 1800mm Pipework; 2350mm Backwall Height; SFA Compliant. Max Pipe Opening PCC 1600 Max Pipe Opening Plastic / Clayware
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
H28C headwall range, backwall heights 1250, 1650, 2130mm
The H28C headwall is a sectional structure with rebated joint, assembled on site around the drainage pipe. It is suitable for plastic pipes up to and including 1650mm or PCC pipes up to and including 1500mm. It will also accommodate twin pipe openings of up to and including 1050mm plastic and 900mm PCC: available with 3 standard backwall heights
H7C headwall range, 1100mm, 1550mm, 2050mm backwall
A one-piece reinforced concrete headwall to suit plastic or clayware pipes up to 525mm or PCC pipes up to 450mm. Available with three standard backwall heights, 1.1m, 1.5m and 2m; lifting points cast in to each wingwall for safe handling using Althon lifting clutches; stainless steel sockets are provided for the attachment of gratings and special
H3C headwall, backwall height 800
A one-piece reinforced concrete headwall to suit plastic or clayware pipes up to 300mm or PCC pipes up to 225mm. Stainless steel sockets are provided for the attachment of gratings; lifting points are cast in to each wingwall for safe handling using Althon lifting clutches; approximate weight 540kg
H44C headwall range, backheight 1120mm - 2340mm
H44C is a one-piece reinforced concrete headwall range particularly suitable for steep embankments. The units are available in three widths and five standard heights. Due to the relatively narrow footprint of the unit (back to front) it is advisable to fit suitable brackets to attach ground anchors: suitable for steep inclines; 1120mm - 2340mm
Rectangular channel precast concrete headwalls
Rectangular Channel Headwalls are made from precast concrete for managing outfalls, with backwall heights from 775mm to 1275mm and pipe openings up to 750mm diameter. Single or multiple pipe openings, channel extensions, and fittings for gratings, handrails, and flow control devices are available: precast concrete headwall for rectangular channels
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
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
Precast Concrete Headwalls - SUDS compliant concrete outfalls
Althon manufactures a large range of precast concrete headwalls, covering pipes, culverts and box culverts. Precast headwalls are a cost-effective and practical alternative to in-situ construction. Designed for use in SUDS drainage schemes, for protecting watercourse outfalls from erosion and providing a compliant, durable discharge point across a
Marshalls Civils & Drainage precast concrete headwalls connect pipework up to 900mm to open watercourses, controlling erosion and soil loss at discharge points. Made from precast concrete, these headwalls are supplied in three sizes with various height options and can be pre-fitted with gratings, Hydro-Brakes®, Penstocks, or Non-return Flap
Headwalls - helping you find the best companies for your project.
Althon
Althon precast headwalls 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
