SP11L precast headwalls are produced with a horizontal wing walls at the front of the apron. SP11L precast headwalls are for inlets or outlets situated in locations with high or 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. SP11L precast headwall has been designed to suit plastic or clay pipework up to 750mm and concrete pipework up to 675mm ID. It has a backwall height of 1570mm and a flat spillway. Althon SP11L precast 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.

SP11 precast headwall units can be factory fitted with a range of accessories such as flap valves, penstocks, Kee Klamp® handrails and a selection of gratings depending on the application.

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

SP11 L Headwall line drawing
As standard our headwalls have a natural concrete finish.
We can offer coloured headwalls in 4 colours but the final shade is affected by many influences.
Our Headwall Products are available in a range of colours
Natural
Our Headwall Products are available in a range of colours
Cotswold
Our Headwall Products are available in a range of colours
Agate
Our Headwall Products are available in a range of colours
Raven Grey
Our Headwall Products are available in a range of colours
Everglade
Product Name
Max Pipe Opening PCC
Max Pipe Opening Plastic / C'ware
Backwall Height
Approx Headwall Weight (kg)
Wingwall Profile
SP11 L Headwall
675
750
1570
3040
1:2

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    SP11 L Headwall + 1000 x 500mm Toe + 3 Sided Kee Klamp + Sfa1 300 Outfall Safety Grille

    SP11 L Headwall + 1000 x 500mm Toe + 3 Sided Kee Klamp + Sfa1 375 Outfall Safety Grille

    SP11 L Headwall + 1000 x 500mm Toe + 3 Sided Kee Klamp + Sfa1 450 Outfall Safety Grille

    SP11 L Headwall + 1000 x 500mm Toe + 3 Sided Kee Klamp + Sfa1 525 Outfall Safety Grille

    SP11 L Headwall + 1000 x 500mm Toe + Cranked Grating + 3 Sided Kee Klamp

    SP11 L Headwall + 1000 x 500mm Toe + Sloped Grating + 3 Sided Kee Klamp

    SP11 L Headwall + 1000 x 500mm Toe + Backwall Kee Klamp

    SP11 L Headwall + 1000 x 500mm Toe + Backwall Kee Klamp + Sfa1 300 Outfall Safety Grille

    SP11 L Headwall + 1000 x 500mm Toe + Backwall Kee Klamp + Sfa1 375 Outfall Safety Grille

    SP11 L Headwall + 1000 x 500mm Toe + Backwall Kee Klamp + Sfa1 450 Outfall Safety Grille

    SP11 L Headwall + 1000 x 500mm Toe + Backwall Kee Klamp + Sfa1 525 Outfall Safety Grille

    SP11 L Headwall + 1000 x 500mm Toe + Cranked Grating + Backwall Kee Klamp

    SP11 L Headwall + 1000 x 500mm Toe + Sloped Grating + Backwall Kee Klamp

    SP11 L Headwall + 1000 x 500mm Toe + Halfway Kee Klamp

    SP11 L Headwall + 1000 x 500mm Toe + Halfway Kee Klamp + Sfa1 300 Outfall Safety Grille

    SP11 L Headwall + 1000 x 500mm Toe + Halfway Kee Klamp + Sfa1 375 Outfall Safety Grille

    SP11 L Headwall + 1000 x 500mm Toe + Halfway Kee Klamp + Sfa1 450 Outfall Safety Grille

    SP11 L Headwall + 1000 x 500mm Toe + Halfway Kee Klamp + Sfa1 525 Outfall Safety Grille

    SP11 L Headwall + 1000 x 500mm Toe + Cranked Grating + Halfway Kee Klamp

    SP11 L Headwall + 1000 x 500mm Toe + Sloped Grating + Halfway Kee Klamp

    SP11 L Headwall + 1000 x 500mm Toe + 100mm Flap Valve

    SP11 L Headwall + 1000 x 500mm Toe + 100mm Flap Valve + Cranked Grating

    SP11 L Headwall + 1000 x 500mm Toe + 100mm Flap Valve + 3 Sided Kee Klamp

    SP11 L Headwall + 1000 x 500mm Toe + 100mm Flap Valve + Cranked Grating + 3 Sided Kee Klamp

    SP11 L Headwall + 1000 x 500mm Toe + 100mm Flap Valve + Backwall Kee Klamp

     

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