Download Datasheet

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

Filters for N20D Headwall Downloads. To Download CAD and PDF Files Please Register or Login

    All Available Downloads for N20D Headwall - Page 15 of 47

    You can select multiple files below to be added to a single zip file, your selections will be retained across different Headwalls

    Title
    PDF
    CAD
    Add to Zip File

    N20D Headwall + 750 x 300mm Toe + 3 Sided Kee Klamp + Sfa1 1050 Outfall Safety Grille

    N20D Headwall + 750 x 300mm Toe + Cranked Grating + 3 Sided Kee Klamp

    N20D Headwall + 750 x 300mm Toe + Backwall Kee Klamp

    N20D Headwall + 750 x 300mm Toe + Backwall Kee Klamp + Sfa1 375 Outfall Safety Grille

    N20D Headwall + 750 x 300mm Toe + Backwall Kee Klamp + Sfa1 450 Outfall Safety Grille

    N20D Headwall + 750 x 300mm Toe + Backwall Kee Klamp + Sfa1 525 Outfall Safety Grille

    N20D Headwall + 750 x 300mm Toe + Backwall Kee Klamp + Sfa1 600 Outfall Safety Grille

    N20D Headwall + 750 x 300mm Toe + Backwall Kee Klamp + Sfa1 675 Outfall Safety Grille

    N20D Headwall + 750 x 300mm Toe + Backwall Kee Klamp + Sfa1 750 Outfall Safety Grille

    N20D Headwall + 750 x 300mm Toe + Backwall Kee Klamp + Sfa1 825 Outfall Safety Grille

    N20D Headwall + 750 x 300mm Toe + Backwall Kee Klamp + Sfa1 900 Outfall Safety Grille

    N20D Headwall + 750 x 300mm Toe + Backwall Kee Klamp + Sfa1 1050 Outfall Safety Grille

    N20D Headwall + 750 x 300mm Toe + Cranked Grating + Backwall Kee Klamp

    N20D Headwall + 750 x 300mm Toe + 100mm Flap Valve

    N20D Headwall + 750 x 300mm Toe + 100mm Flap Valve + Cranked Grating

    N20D Headwall + 750 x 300mm Toe + 100mm Flap Valve + 3 Sided Kee Klamp

    N20D Headwall + 750 x 300mm Toe + 100mm Flap Valve + Cranked Grating + 3 Sided Kee Klamp

    N20D Headwall + 750 x 300mm Toe + 100mm Flap Valve + Backwall Kee Klamp

    N20D Headwall + 750 x 300mm Toe + 100mm Flap Valve + Cranked Grating + Backwall Kee Klamp

    N20D Headwall + 750 x 300mm Toe + 150mm Flap Valve

    N20D Headwall + 750 x 300mm Toe + 150mm Flap Valve + Cranked Grating

    N20D Headwall + 750 x 300mm Toe + 150mm Flap Valve + 3 Sided Kee Klamp

    N20D Headwall + 750 x 300mm Toe + 150mm Flap Valve + Cranked Grating + 3 Sided Kee Klamp

    N20D Headwall + 750 x 300mm Toe + 150mm Flap Valve + Backwall Kee Klamp

    N20D Headwall + 750 x 300mm Toe + 150mm Flap Valve + Cranked Grating + Backwall Kee Klamp

     

    Brochures, Datasheets and Installation Instructions for N20D Headwall

    Free headwall design service

    If you cannot find what you are looking for our Free Headwall Design Service can help.

    More information