Land Drainage Headwalls
All drainage pipes discharging into an open water course should be fitted with a suitable
headwall to protect and locate the outfall pipe and minimize erosion at the discharge point. Cotterill Civils supply a range of
headwalls to suit all pipe sizes from 100mm up to 1800mm diameter.
The small sizes are made from GRC or Glass Reinforced Cement. This makes then conveniently lightweight and easy to install.
Small, general purpose, GRC headwalls. 100mm 300mm pipe sizes.
The larger pipe sizes and faster flowing water course applications are made from
PCC or Pre Cast Concrete.
300mm PCC headwall. Also 150mm 600mm twin wall pipe sizes.
We also supply a full range of standard or bespoke size vermin and debris gates to fit our headwalls. This prevents the ingress of unwanted animals or debris up the drain in high water situations.
Galvanised, mild steel vermin/debris gate. Also available in stainless steel.
Generally pre-cast headwalls can be installed at a fraction of the cost of in-situ structures and have the advantage that during major maintenance work they can be removed and refitted.