SP20 J Headwall

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.

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.

All Althon SP Headwalls are available with either 300 or 500mm thick toe extensions. If you cannot find the drawing or information you are looking for please contact us.

SP20 Headwall Range Max Pipe Opening (I.D) Plastic/C'ware Max Pipe Opening (I.D) PCC A mm B mm Approx Weight (kg)
SP20 J No Toe 1200 1350 2000 0 7700 CAD & PDF Details
SP20 J 400 x 300mm Toe 1200 1350 2000 400 8795 CAD & PDF Details
SP20 J 650 x 300mm Toe 1200 1350 2000 650 9450 CAD & PDF Details
SP20 J 900 x 300mm Toe 1200 1350 2000 900 10160 CAD & PDF Details
SP20 J 500 x 500mm Toe 1200 1350 2000 500 9524 Details
SP20 J 750 x 500mm Toe 1200 1350 2000 750 10664 Details
SP20 J 1000 x 500mm Toe 1200 1350 2000 1000 11804 Details

Althon Headwalls offer a cost effective alternative to in-situ structures for connecting pipework discharging into open water courses.

All drainage pipes discharging into open watercourses, such as swales, ditches, ponds and rivers, should be fitted with an appropriate Althon headwall.

Sales Team: 01603 488700

Email: sales@althon.co.uk