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: Precast concrete headwalls with penstocks
    Precast concrete headwalls with penstocks
    Althon
    Product, 13 September 2018
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  • Althon: 60° sloped trash screens
    60° sloped trash screens
    Althon
    Product, 12 September 2018
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  • Althon: SFA15 D headwall, backwall height 2350
    SFA15 D headwall, backwall height 2350
    Althon
    Product, 14 September 2018
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  • Althon: SFA20 D headwall, backwall height 2350
    SFA20 D headwall, backwall height 2350
    Althon
    Product, 14 September 2018
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  • Althon: Precast concrete headwalls with cascade panels
    Precast concrete headwalls with cascade panels
    Althon
    Product, 13 January 2020
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  • Althon: CSP box culvert headwalls
    CSP box culvert headwalls
    Althon
    Product, 25 October 2018
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  • Althon: Angled precast concrete headwalls
    Angled precast concrete headwalls
    Althon
    Product, 07 March 2022
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  • Althon: Two piece heavy duty silt trap inlet
    Two piece heavy duty silt trap inlet
    Althon
    Product, 28 February 2019
    Product
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  • Althon: RSFA20 rectangular precast concrete headwall
    RSFA20 rectangular precast concrete headwall
    Althon
    Product, 05 March 2019
    Product
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  • Althon: SFA15 A headwall, backwall height 1300
    SFA15 A headwall, backwall height 1300
    Althon
    Product, 14 September 2018
    Product
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  • Marshalls plc: Precast concrete headwalls
    Precast concrete headwalls
    Marshalls plc
    Product, 22 June 2021
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  • Althon: SFA concrete headwalls with precast steps
    SFA concrete headwalls with precast steps
    Althon
    Product, 23 May 2022
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  • Althon: H10C headwall range, 1250/1650/2130 backwall height
    H10C headwall range, 1250/1650/2130 backwall height
    Althon
    Product, 14 September 2018
    Product
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  • Althon: SFA15 C headwall, backwall height 2000
    SFA15 C headwall, backwall height 2000
    Althon
    Product, 14 September 2018
    Product
    SAVE Product
  • Althon: H3C headwall, backwall height 800
    H3C headwall, backwall height 800
    Althon
    Product, 14 September 2018
    Product
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  • Althon: Precast concrete headwalls with penstocks
    Precast concrete headwalls with penstocks
    Althon
    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...
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  • 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...
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  • Althon: SFA15 D headwall, backwall height 2350
    SFA15 D headwall, backwall height 2350
    Althon
    SFA15 D 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 1200mm up to 1200mm Pipework; 2350mm...
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  • 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.
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  • Althon: Precast concrete headwalls with cascade panels
    Precast concrete headwalls with cascade panels
    Althon
    Precast concrete headwalls can be manufactured with cascade panels to special order. A recent example is a precast concrete headwall complete with an 8.5m-long cascade panel for a project in Sunderland. Althon's Headwall...
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  • 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...
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  • Althon: Angled precast concrete headwalls
    Angled precast concrete headwalls
    Althon
    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
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  • Althon: Two piece heavy duty silt trap inlet
    Two piece heavy duty silt trap inlet
    Althon
    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...
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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: SFA15 A headwall, backwall height 1300
    SFA15 A headwall, backwall height 1300
    Althon
    SFA15 A precast concrete headwall for connecting pipework discharging into open watercourses. Sewers for Adoption compliant. Pipework up to 750mm. Backwall height 1300mm
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  • 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;...
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  • Althon: SFA concrete headwalls with precast steps
    SFA concrete headwalls with precast steps
    Althon
    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...
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  • Althon: H10C headwall range, 1250/1650/2130 backwall height
    H10C headwall range, 1250/1650/2130 backwall height
    Althon
    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...
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  • Althon: SFA15 C headwall, backwall height 2000
    SFA15 C headwall, backwall height 2000
    Althon
    SFA15 C precast concrete headwall for connecting pipework discharging into open watercourses. Sewers for Adoption compliant. Pipework up to 1200mm. Backwall height 2000mm
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  • Althon: H3C headwall, backwall height 800
    H3C headwall, backwall height 800
    Althon
    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...
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