Download Datasheet

SP20L precast headwalls are produced with wing walls 1050mm high at the front of the apron. SP20L 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. SP20L precast headwalls have been designed to suit plastic, clay and concrete pipework up to 1500mm and have a backwall height of 2350mm. SP20 L precast headwalls are manufactured in 2 sections. Althon SP20L 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.

SP20 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. The SP20L headwall weighs 7865kg / 3933kg per half.

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

SP20 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)
SP20 L Headwall
1500
1500
2350
7865

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    SP20 L Headwall + 750 x 500mm Toe + Backwall Kee Klamp + Sfa1 600 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Backwall Kee Klamp + Sfa1 675 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Backwall Kee Klamp + Sfa1 750 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Backwall Kee Klamp + Sfa1 825 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Backwall Kee Klamp + Sfa1 900 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Backwall Kee Klamp + Sfa1 1050 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Backwall Kee Klamp + Sfa1 1200 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Cranked Grating + Backwall Kee Klamp

    SP20 L Headwall + 750 x 500mm Toe + Sloped Grating + Backwall Kee Klamp

    SP20 L Headwall + 750 x 500mm Toe + Halfway Kee Klamp

    SP20 L Headwall + 750 x 500mm Toe + Halfway Kee Klamp + Sfa1 375 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Halfway Kee Klamp + Sfa1 450 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Halfway Kee Klamp + Sfa1 525 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Halfway Kee Klamp + Sfa1 600 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Halfway Kee Klamp + Sfa1 675 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Halfway Kee Klamp + Sfa1 750 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Halfway Kee Klamp + Sfa1 825 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Halfway Kee Klamp + Sfa1 900 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Halfway Kee Klamp + Sfa1 1050 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Halfway Kee Klamp + Sfa1 1200 Outfall Safety Grille

    SP20 L Headwall + 750 x 500mm Toe + Cranked Grating + Halfway Kee Klamp

    SP20 L Headwall + 750 x 500mm Toe + Sloped Grating + Halfway Kee Klamp

    SP20 L Headwall + 750 x 500mm Toe + 100mm Flap Valve

    SP20 L Headwall + 750 x 500mm Toe + 100mm Flap Valve + Cranked Grating

    SP20 L Headwall + 750 x 500mm Toe + 100mm Flap Valve + 3 Sided Kee Klamp

     

    Brochures, Datasheets and Installation Instructions for SP20 L Headwall

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