Althon manufacture concrete headwalls with precast dissipation blocks on the spillway. We factory fit the dissipation blocks to our precast headwalls ensuring they fit properly every time and reducing installation time on site. Dissipation blocks slow down the flow of water discharging from the pipe across the spillway of the headwall before entering the watercourse.  

We can fit dissipation blocks to the spillway of a headwall in any arrangement required, space permitting.

If you would like to specify a headwall with dissipation blocks 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.


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