Althon 400 Mitred Headwall is a fibre reinforced precast concrete open inlet for surface water runoff, suitable for pipework up to 375mm and 400mm internal diameter, with a 1:3 (18°) mitred profile matching swale and pond slopes, and supplied with a galvanised steel straight bar grating.

  • Fibre reinforced precast concrete headwall for 375mm and 400mm pipes
  • Mitred 1:3 (18°) profile aligns with typical swale and pond embankments
  • Open inlet design for SUDS, outfall, or overflow use
  • Galvanised steel straight bar grating included as standard
  • Can be factory fitted with a 400mm inline non-return valve
  • Natural concrete finish with four colour options: Natural, Cotswold, Agate, Raven Grey, Everglade
  • PDF and CAD files available for download

Applications

  • Surface water runoff entry to SUDS features
  • Outlets or overflows for swales and ponds
  • Drainage systems using 375mm or 400mm pipes
  • Adoptable drainage infrastructure

Dimensions

Max pipe opening (PCC): 375mm

Max pipe opening (Plastic/Clayware): 400mm

Backwall height: 951mm

Approximate headwall weight: 3650kg

Materials

Fibre reinforced precast concrete

Galvanised steel grating

Finish

Natural concrete as standard

Colour options: Natural, Cotswold, Agate, Raven Grey, Everglade

Options and variations

Factory fitted 400mm inline non-return valve (e.g. WaStop)

Choice of four colour finishes

Technical support

Free headwall design service available