Headwalls - from top UK suppliers

Althon manufactures precast concrete headwalls with factory-fitted flap valves ensuring they fit properly and reducing installation time on site. Factory-fitting flap valves to headwalls means the headwalls do not have to be drilled once on site. Althon can fit multiple flap valves to a single headwall and offers flap valves fitted to concrete...

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...

Althon manufactures a comprehensive range of rectangular headwalls, including versions that are SFA (Sewers for Adoption) compliant...

Althon offers a full design and build service for bespoke headwall requirements, resulting in the manufacture and supply of a precast bespoke headwall that is uniquely tailored to a specific set of criteria....

The CSP range of precast concrete box culvert headwalls from Althon is designed to offer a cost-effective alternative to in-situ structures for connecting pipework discharging into open watercourses. Suitable applications include swales, ponds, rivers and ditches. Units can be pre-fitted with a range of accessories including flap valves...

Althon's standard range of headwalls can accommodate pipework up 2100mm. Multiple pipe openings can be precast into outfalls if required. As standard Althon will cast in the pipe openings 100-150mm above the spillway. However, it is able to cast in the opening for the connecting pipe or pipes anywhere on the backwall or in the wingwalls...

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...

Althon small precast headwalls are suitable for pipe sizes ranging from 100mm to 450mm concrete or 600mm plastic pipework. Openings are cast to suit the outsider diameter of the connecting pipework. Small headwalls can be factory fitted with a range of accessories such as flap valves, penstocks, gratings and handrails: 100 to 450mm (concrete)...

Althon medium precast headwalls are suitable for pipe sizes ranging from 450 to 900mm concrete or plastic pipework. Headwall openings are cast to suit the outsider diameter of the connecting pipework. Medium headwalls can be factory fitted with a range of accessories such as flap valves, penstocks, gratings and handrails: h10C headwalls; SFA...

Althon large precast headwalls are suitable for pipe sizes ranging from 750 to 1200mm concrete or plastic pipework. Headwall openings are cast to suit the outside diameter of the connecting pipework. Large headwalls can be factory fitted with a range of accessories such as flap valves, penstocks, gratings and handrails: h20C headwalls; SP20...

R7C precast headwalls are suitable for highways applications and are available in a range of backwall heights and wingwall profiles for pipework up to and including 500mm ID. Althon R7C headwalls for motorways and other road projects can be factory-fitted with accessories such as handrails, trash screens, flap valve and penstocks. R7C A Headwall...

Headwalls provide much-needed protection to drainage pipes and outlets discharging water into rivers, swales, ponds and ditches. A suitable headwall will protect the area surrounding the culvert from erosion whilst retaining the embankment. As a result, the efficiency and longevity of the culvert is increased. Rootlok headwalls offer an effective...

The H3G GRC headwall is a precast glass-reinforced cement headwall with an opening to suit 150mm diameter pipes and knockout webs to enlarge to 225mm and 300mm diameter pipes. Cost-effective alternative to in-situ structures for connecting drainage pipework discharging into open water courses. Nominal wall thickness 20mm. Toe depth 150mm. Stainless steel grating sockets....

The swale and pond inlet is a fibre reinforced precast concrete open inlet 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 swales and ponds. There is a recess...

Marshalls Civils & Drainage manufactures off-site precast concrete headwalls designed to connect pipe outflows into open water courses: accommodates pipe diameters up to 900mm; optional pre-fitting with closed coupled and cranked gratings; three standard sizes and various height options available; can be supplied with Hydro-Brakes®, penstocks and...

Coloured precast concrete headwalls from Althon are particularly suitable for aesthetically-sensitive areas and can help the installation blend into the surrounding landscape. A colouring additive for cementitious materials is added, providing a uniform, streak-free colour...

Althon offers an extensive range of precast concrete headwalls. To make the selection of a headwall and its associated factory-fitted accessories as easy as possible, Althon provides an online Headwall Specification and Selection Tool, which quickly identifies the appropriate headwall model required and links to specific download files in a...

Althon sloped trash screens with a 45° rake are manufactured in galvanised mild steel: 40 x 10mm flats at 75mm centres, and 50 x 12mm flats at 100mm centres; designed to suit pipework up to and including 1500mm; manufactured to any size and specification required outside of the standard range, if required; also available in stainless steel, on...

Althon sloped trash screens with a 60° rake are manufactured in galvanised mild steel: 40 x 10mm flats at 75mm centres, and 50 x 12mm flats at 100mm centres; designed to suit pipework up to and including 1500mm; manufactured to any size and specification required outside of the standard range, if required; also available in stainless steel, on...

Althon can produce bespoke gratings and trash screens for in-situ structures and precast headwalls to any specification. Gratings are typically manufactured in either galvanised steel, stainless steel grade 304 or grade 316. Other materials can be discussed if required. Cranked gratings are manufactured for use with flow control devices such as...

Althon Sewers for Adoption (SFA) precast concrete 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 culvert headwalls recess the inflow and outflow at the end of the pipe or culvert into the slope to improve entrance flow conditions, and to anchor the pipe and prevent disjointing due to excessive velocities...

Althon precast concrete headwalls can be supplied to site with factory-fitted penstocks. As standard, Althon offers penstocks fitted to headwalls to suit pipework from 100 up to 1500mm. When required, Althon can provide bespoke sized penstocks or headwalls....

Althon offers precast concrete SFA (Sewers for Adoption) compliant headwalls, complete with precast concrete steps. Typically, Althon's 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....