Althon standard precast concrete headwalls are designed for connecting drainage pipes to open watercourses. The range accommodates pipe sizes up to 2100mm, with options for multiple pipe openings and custom pipe positions. Factory-fitted accessories and compliance with UK water authority guidelines distinguish this product range.

  • Precast concrete headwalls for pipework up to 2100mm

  • Multiple pipe openings and custom pipe positions available

  • Factory-fitted accessories such as safety grilles, handrails, flap valves and penstocks

  • Complies with Sewers for Adoption, Severn Trent, Environment Agency, and Sewers for Scotland guidelines

  • Fast and easy installation without on-site formwork

  • Available with extended spillways, baffle blocks and steps

  • Lightweight GRC headwall option for pipework up to 300mm

Applications

  • Connecting drainage pipes to open watercourses

  • Outfalls for stormwater and surface water systems

  • Discharge points in civil engineering and infrastructure projects

  • Water management in residential, commercial and industrial developments

  • Flood prevention and riverbank protection schemes

Dimensions

Pipework capacity: up to 2100mm

Backwall height range: 1100–2100mm

Unit weights: from 530kg (smallest)

Materials

Made from precast concrete

Lightweight GRC option for smaller sizes

Options and variations

Standard, horizontal or chamfered wingwalls

Stepped baffle blocks, diffuser blocks, extended spillways, cascade panels and precast steps

Multiple pipe openings and custom pipe invert levels

Installation

Factory-fitted accessories and fixings

No on-site formwork or shuttering required

Accreditations

Complies with Sewers for Adoption, Severn Trent, Environment Agency, and Sewers for Scotland guidelines