Althon 450 Mitred Headwall is a fibre reinforced precast concrete open inlet for surface water runoff, designed for pipework up to 450mm internal diameter. Inlet profile matches a 1:3 (18°) slope for swales and ponds, with a galvanised steel straight bar grating as standard and optional inline non-return valve.

  • Fibre reinforced precast concrete headwall for 450mm pipes
  • Open inlet design for SUDS, swales, ponds, and overflows
  • 1:3 (18°) mitred profile aligns with ground contours
  • Galvanised steel straight bar grating included
  • Optional factory-fitted 450mm inline non-return valve
  • Natural concrete finish as standard, with four colour options
  • PDF and CAD files available for download

Applications

  • Surface water runoff management
  • Sustainable drainage systems (SUDS)
  • Swales and pond inlets or outlets
  • Overflow structures
  • Pipework discharges up to 450mm ID

Dimensions

Max pipe opening: 450mm

Backwall height: 951mm

Approximate weight: 3550kg

Materials

Fibre reinforced precast concrete

Galvanised steel grating

Finish

Natural concrete finish

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

Options and variations

Factory-fitted 450mm inline non-return valve

Four colour finishes (final shade may vary)

Technical support

Free headwall design service