Headwalls and outfalls for connecting drainage pipework discharging into open watercourses such as rivers, streams, lakes, swales and ponds. On EXTERNAL WORKS. Helping you find the best product for your project.
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  • Althon: CSP box culvert headwalls
    CSP box culvert headwalls
    Althon
    Product, 25 October 2018
    Product
    SAVE Product
  • Althon: Large precast concrete headwalls
    Large precast concrete headwalls
    Althon
    Product, 01 April 2019
    Product
    SAVE Product
  • Althon: 60° sloped trash screens
    60° sloped trash screens
    Althon
    Product, 12 September 2018
    Product
    SAVE Product
  • Althon: H50C headwall, backwall height 815
    H50C headwall, backwall height 815
    Althon
    Product, 13 September 2018
    Product
    SAVE Product
  • Althon: Swale inlet headwall
    Swale inlet headwall
    Althon
    Product, 28 February 2019
    Product
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  • Althon: H8C headwall range,  1100 / 1500 / 2100 backwall height
    H8C headwall range, 1100 / 1500 / 2100 backwall height
    Althon
    Product, 14 September 2018
    Product
    SAVE Product
  • Marshalls plc: Precast concrete headwalls
    Precast concrete headwalls
    Marshalls plc
    Product, 22 June 2021
    Product
    SAVE Product
  • ACO Water Management: ACO SuDS Swale Inlet unit
    ACO SuDS Swale Inlet unit
    ACO Water Management
    Product, 18 July 2019
    Product
    SAVE Product
  • Althon: SFA27 C headwall, backwall height 2000
    SFA27 C headwall, backwall height 2000
    Althon
    Product, 14 September 2018
    Product
    SAVE Product
  • Althon: SFA (Sewers for adoption) headwalls
    SFA (Sewers for adoption) headwalls
    Althon
    Product, 08 July 2019
    Product
    SAVE Product
  • Althon: RSFA20 rectangular precast concrete headwall
    RSFA20 rectangular precast concrete headwall
    Althon
    Product, 05 March 2019
    Product
    SAVE Product
  • Althon: SFA27 B headwall, backwall height 1650
    SFA27 B headwall, backwall height 1650
    Althon
    Product, 14 September 2018
    Product
    SAVE Product
  • Althon: SFA20 D headwall, backwall height 2350
    SFA20 D headwall, backwall height 2350
    Althon
    Product, 14 September 2018
    Product
    SAVE Product
  • Althon: 45° sloped trash screens
    45° sloped trash screens
    Althon
    Product, 12 September 2018
    Product
    SAVE Product
  • Althon: H20C headwall range, backwall heights 1.25/1.65/2.13m
    H20C headwall range, backwall heights 1.25/1.65/2.13m
    Althon
    Product, 14 September 2018
    Product
    SAVE Product
  • Althon: CSP box culvert headwalls
    CSP box culvert headwalls
    Althon
    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...
    SAVE Product
  • Althon: Large precast concrete headwalls
    Large precast concrete headwalls
    Althon
    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...
    SAVE Product
  • Althon: 60° sloped trash screens
    60° sloped trash screens
    Althon
    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...
    SAVE Product
  • Althon: H50C headwall, backwall height 815
    H50C headwall, backwall height 815
    Althon
    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...
    SAVE Product
  • Althon: Swale inlet headwall
    Swale inlet headwall
    Althon
    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...
    SAVE Product
  • Althon: H8C headwall range,  1100 / 1500 / 2100 backwall height
    H8C headwall range, 1100 / 1500 / 2100 backwall height
    Althon
    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...
    SAVE Product
  • Marshalls plc: Precast concrete headwalls
    Precast concrete headwalls
    Marshalls plc
    Marshalls CPM 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;...
    SAVE Product
  • ACO Water Management: ACO SuDS Swale Inlet unit
    ACO SuDS Swale Inlet unit
    ACO Water Management
    The ACO SuDS Swale Inlet unit is an aesthetically pleasing solution for drainage applications where proprietary conveyance systems are linked to vegetated infiltration features such as swales, basins, ponds and water courses. The...
    SAVE Product
  • Althon: SFA27 C headwall, backwall height 2000
    SFA27 C headwall, backwall height 2000
    Althon
    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...
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  • Althon: SFA (Sewers for adoption) headwalls
    SFA (Sewers for adoption) headwalls
    Althon
    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...
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  • Althon: RSFA20 rectangular precast concrete headwall
    RSFA20 rectangular precast concrete headwall
    Althon
    Althon RSFA20 are Sewers for Adoption compliant rectangular precast concrete headwalls for outfalls discharging into ponds, swales, ditches beaches and rivers. RSFA precast headwalls come with the option of two thicknesses of...
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  • Althon: SFA27 B headwall, backwall height 1650
    SFA27 B headwall, backwall height 1650
    Althon
    SFA27 B precast concrete headwall for connecting pipework discharging into open watercourses. Sewers for Adoption compliant. Pipework up to 1050mm. Backwall height 1650mm
    SAVE Product
  • Althon: SFA20 D headwall, backwall height 2350
    SFA20 D headwall, backwall height 2350
    Althon
    SFA20 D precast concrete headwall for connecting pipework discharging into open watercourses. Sewers for Adoption compliant. Pipework up to 1500mm. Backwall height 2350mm.
    SAVE Product
  • Althon: 45° sloped trash screens
    45° sloped trash screens
    Althon
    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...
    SAVE Product
  • Althon: H20C headwall range, backwall heights 1.25/1.65/2.13m
    H20C headwall range, backwall heights 1.25/1.65/2.13m
    Althon
    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...
    SAVE Product