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N20D range of precast headwalls are suited for installation where you have steep banks or little depth from back to front for installation

Our N20D range of headwalls are manufactured to the same standards as our Sewers for Adoption headwalls and can be used on Section 104 Agreements where the sewers are to be adopted by the local water company.

N20D headwalls have been designed to suit plastic and clay pipework up to 1200mm ID or concrete pipework up to 1050mm ID. 

N20D precast concrete outfalls 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, penstocks, ladders, Kee Klamp® handrails 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

N20D 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
N20D Headwall
1050
1200
1750
3985
1:3

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    All Available Downloads for N20D Headwall - Page 37 of 47

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    N20D Headwall + 750 x 500mm Toe + 700mm Flap Valve

    N20D Headwall + 750 x 500mm Toe + 700mm Flap Valve + Cranked Grating

    N20D Headwall + 750 x 500mm Toe + 700mm Flap Valve + 3 Sided Kee Klamp

    N20D Headwall + 750 x 500mm Toe + 700mm Flap Valve + Cranked Grating + 3 Sided Kee Klamp

    N20D Headwall + 750 x 500mm Toe + 700mm Flap Valve + Backwall Kee Klamp

    N20D Headwall + 750 x 500mm Toe + 700mm Flap Valve + Cranked Grating + Backwall Kee Klamp

    N20D Headwall + 750 x 500mm Toe + 800mm Flap Valve

    N20D Headwall + 750 x 500mm Toe + 800mm Flap Valve + Cranked Grating

    N20D Headwall + 750 x 500mm Toe + 800mm Flap Valve + 3 Sided Kee Klamp

    N20D Headwall + 750 x 500mm Toe + 800mm Flap Valve + Cranked Grating + 3 Sided Kee Klamp

    N20D Headwall + 750 x 500mm Toe + 800mm Flap Valve + Backwall Kee Klamp

    N20D Headwall + 750 x 500mm Toe + 800mm Flap Valve + Cranked Grating + Backwall Kee Klamp

    N20D Headwall + 750 x 500mm Toe + 900mm Flap Valve

    N20D Headwall + 750 x 500mm Toe + 900mm Flap Valve + Cranked Grating

    N20D Headwall + 750 x 500mm Toe + 900mm Flap Valve + 3 Sided Kee Klamp

    N20D Headwall + 750 x 500mm Toe + 900mm Flap Valve + Cranked Grating + 3 Sided Kee Klamp

    N20D Headwall + 750 x 500mm Toe + 900mm Flap Valve + Backwall Kee Klamp

    N20D Headwall + 750 x 500mm Toe + 900mm Flap Valve + Cranked Grating + Backwall Kee Klamp

    N20D Headwall + 750 x 500mm Toe + 1000mm Flap Valve

    N20D Headwall + 750 x 500mm Toe + 1000mm Flap Valve + Cranked Grating

    N20D Headwall + 750 x 500mm Toe + 1000mm Flap Valve + 3 Sided Kee Klamp

    N20D Headwall + 750 x 500mm Toe + 1000mm Flap Valve + Cranked Grating + 3 Sided Kee Klamp

    N20D Headwall + 750 x 500mm Toe + 1000mm Flap Valve + Backwall Kee Klamp

    N20D Headwall + 750 x 500mm Toe + 1000mm Flap Valve + Cranked Grating + Backwall Kee Klamp

    N20D Headwall + 750 x 500mm Toe + 150mm Penstock

     

    Brochures, Datasheets and Installation Instructions for N20D Headwall

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