Althon manufacture concrete headwalls with flap valves. We factory fit the flap valves to our precast headwalls ensuring they fit properly every time and reducing installation time on site. Factory fitting flap valves to headwalls means the headwalls do not have to be drilled once on site.

We can fit multiple flap valves to a single headwall and offer flap valves fitted to concrete headwalls in HDPE and cast iron.

If you would like to specify a headwall with flap valves please fill out our Headwall Design Request Form and we will email you back CAD and PDF drawings.

You can also visit the Precast Headwalls section of our website or the Flap Valves section.

If you require any assistance or more information please contact us by phone on 01603 488700 or by email