Backwall Height

Backwall heights: 1300mm - 2350mm

Single or Multiple Pipe openings

Single or multiple pipe openings

Specifiable invert levels

Specifiable pipe invert levels

Maximum pipe size

Maximum pipe size:
1500mm

Althon SP ‘Splayed Wing Wall Headwalls’ are produced with a higher wing wall at the front of the apron.  This makes them ideal for inlets or outlets where situated in locations with high/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 Weir Wall.  Althon SP20 precast concrete headwalls offer a cost effective alternative to in-situ structures for connecting pipework discharging into open watercourses.

There are four sizes of SP20 headwall available, catering for pipe sizes up to and including 1500mm. Each size of concrete headwall comes with six depths of toe and four back wall heights offering wing wall profiles to suit most applications.

All SP20 concrete headwalls are cast to suit the diameter and type of pipe being used and can be provided with fixings cast in at the time of manufacture to accommodate gratings, trash screens, flap valves, ladders, guardrails and flow and depth monitoring equipment.

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

SP20 E Headwall

SP20 E Headwall

  • Up to 750mm Pipework
  • 1300mm Backwall Height
SP20 F Headwall

SP20 F Headwall

  • Up to 1050mm Pipework
  • 1650mm Backwall Height
SP20 G Headwall

SP20 G Headwall

  • Up to 1050mm Pipework
  • 1650mm Backwall Height
SP20 H Headwall

SP20 H Headwall

  • Up to 1200mm Pipework
  • 2000mm Backwall Height
SP20 I Headwall

SP20 I Headwall

  • Up to 1200mm Pipework
  • 2000mm Backwall Height
SP20 J Headwall

SP20 J Headwall

  • Up to 1200mm Pipework
  • 2000mm Backwall Height
SP20 K Headwall

SP20 K Headwall

  • Up to 1500mm Pipework
  • 2350mm Backwall Height
SP20 L Headwall

SP20 L Headwall

  • Up to 1500mm Pipework
  • 2350mm Backwall Height
SP20 M Headwall

SP20 M Headwall

  • Up to 1500mm Pipework
  • 2350mm Backwall Height
SP20 N Headwall

SP20 N Headwall

  • Up to 1500mm Pipework
  • 2350mm Backwall Height