Integrated stormwater management solutions on EXTERNAL WORKS. Helping you find the best product for your project.
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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
  • Hydro International: Hydro Biofilter™ bioretention system
    Hydro Biofilter™ bioretention system
    Hydro International
    The Hydro Biofilter™ bioretention system captures stormwater runoff and naturally treats the pollutants. It significantly improves upon traditional bioretention and biofilter designs by combining specialist engineered media...
  • Althon: CH20C culvert headwall range, backwall height 1250-2130
    CH20C culvert headwall range, backwall height 1250-2130
    Althon
    The CH20C culvert headwall is a sectional structure that is assembled on site around the box culvert. It is suitable for culvert openings up to 1500 x 1500mm. Available with 1.25, 1.65 or 2.1m high backwall. Standard,...
  • 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...
  • Althon: Bespoke precast concrete headwalls
    Bespoke precast concrete headwalls
    Althon
    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.
  • 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.
  • Althon: SFA27 A headwall, backwall height 1300
    SFA27 A headwall, backwall height 1300
    Althon
    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...
  • Polypipe Civils: RIDGISTORMControl penstocks, gate valves and flap valves
    RIDGISTORMControl penstocks, gate valves and flap valves
    Polypipe Civils
    RIDGISTORMControl chambers with penstocks, gate valves or flap valves are used in drainage and sewer systems to facilitate maintenance, control the system flow and protect the system from surcharging. Gate valves are used to...
  • Althon: RSFA18 rectangular precast concrete headwall
    RSFA18 rectangular precast concrete headwall
    Althon
    RSFA18 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 toe,...
  • 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...
  • 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
  • Polypipe Civils: Permavoid Sports - surface water management system
    Permavoid Sports - surface water management system
    Polypipe Civils
    Permavoid is a geocellular interlocking system designed for shallow ground water storage or infiltration, to be used in place of traditional aggregate sub-base, or to provide source control above ground at both roof and...
  • 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...
  • Althon: Althon GRC small headwall
    Althon GRC small headwall
    Althon
    The Althon GRC small headwall is a lightweight, one-piece, recessed unit that is supplied with a unique anchorage system. For most situations where batter angle is not less than 45 degrees, and for use in minor water courses...
  • Polypipe Civils: Polystorm Xtra geocellular system for high traffic areas
    Polystorm Xtra geocellular system for high traffic areas
    Polypipe Civils
    Polystorm Xtra modular geocellular structures are used for the control and management of surface water in deeper burial depths and heavily trafficked applications, such as lorry parks and industrial access roads. They are...