The Althon standard range of headwalls can accommodate pipework up 2100mm. We can precast multiple pipe openings into our outfalls if required. As standard we will cast in the pipe openings 100-150mm above the spillway. However we are able to cast in the opening for the connecting pipe or pipes anywhere on the backwall or in the wingwalls (sidewalls). Drainage pipes discharging into open watercourses should be fitted with a concrete headwalls. Althon's standard concrete headwalls are fast and easy to install.

All Althon headwalls can be factory fitted with accessories such as outfall safety grilles, Kee Klamp® handrails, flap valves and penstocks. We are also able to provide additional precast elements, such as diffuser blocks, stepped baffle blocks, extended spillways with cascade panels and in some instances precast steps. We are happy to help design a precast concrete outfall & spillway to your site specific requirements.

Althon have the largest range of precast headwalls with associated accessories available in the UK. If you cannot find the product you are looking for please get in touch with us and we will be happy to assist. We are constantly uploading new ranges and new drawings to our website, we are confident we will be able to meet your spillway and outfall requirements.

If you require any assistance or more information please contact us by phone on 01603 488700 or by email sales@althon.co.uk

H3C Headwall

H3C Headwall

  • Up to 300mm Pipework
  • Only 540KG
H6C Headwall Range

H6C Headwall Range

  • Up to 600mm Pipework
  • 1100-2050mm Backwall Height
H7C Headwall Range

H7C Headwall Range

  • Up to 600mm Pipework
  • 1100-2050mm Backwall Height
H8C Headwall Range

H8C Headwall Range

  • Up to 600mm Pipework
  • 1150-2100mm Backwall Height
H10C Headwall Range

H10C Headwall Range

  • Up to 900mm Pipework
  • Standard, Horizontal or Chamfered Wingwalls
H20C Headwall Range

H20C Headwall Range

  • Up to 1650mm Pipework
  • Standard, Horizontal or Chamfered Wingwalls
H28C Headwall Range

H28C Headwall Range

  • Up to 1650mm Pipe / 1050 Twin Pipe
  • Standard, Horizontal or Chamfered Wingwalls
XLS18

XLS18

  • Up to 1200mm Pipework
  • 200mm Thick Walls / 120 Year Design Life
XLS25

XLS25

  • Up to 2100mm Pipework
  • 200mm Thick Walls / 120 Year Design Life
H40C Headwall Range

H40C Headwall Range

  • Up to 600mm Pipework
  • Suitable for steep inclines
H42C Headwall Range

H42C Headwall Range

  • Up to 750mm Pipework
  • Suitable for steep inclines
H44C Headwall Range

H44C Headwall Range

  • Up to 1200mm Pipework
  • Suitable for steep inclines
H50C Headwall

H50C Headwall

  • Up to 600mm Pipework
  • Suitable for shallow inclines
GRC Headwalls

GRC Headwalls

  • Pipework up to 300mm
  • Lightweight GRC Headwall Unit

Benefits of Althon Precast Headwalls

  • Headwalls are precast in controlled factory conditions
  • Precast headwalls can be manufactured to accommodate multiple pipe openings
  • Pipe invert level and opening can be specified to site specific requirements
  • Precast headwalls as fast, easy and safe to install
  • Precast headwalls do not require any on-site formwork or shuttering
  • We supply flap valves, penstocks and other flow control devices factory fitted
  • Headwalls supplied with Kee Klamp® handrails & fixing points cast in at the factory
  • We supply a range of outfall safety grilles and trash screens factory fitted
  • We have headwalls that comply with Sewers for Adoption Guidelines
  • Althon have a range of Severn Trent specification precast headwalls
  • We have precast headwalls designed to Environment Agency guidelines
  • Althon headwalls are also Sewers for Scotland compliant