Althon manufacture concrete headwalls with fitted orifice plates. We can supply orifice plates fitted to our headwalls in either galvanised steel or stainless steel. We factory fit the orifice plates to our precast headwalls ensuring they fit properly every time and reducing installation time on site. Factory fitting orifice plates to headwalls means the headwalls do not have to be drilled once on site.

We can fit multiple orifice plates to a single headwall if required or produce a single orifice plate with multiple apertures.

If you would like to specify a headwall with a orifice plate 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 Orifice Plates section.


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