Precast Concrete Headwalls

Precast concrete headwalls, wingwalls, spillways and other precast pipe outfall structures help improve the flow of water into and out of connecting pipework and offer protection from erosion and scour caused by fast moving turbulent water. A headwall also prevents the surrounding bank from eroding and sloughing into any adjacent watercourse, for example; attenuation ponds, detention basins, rivers, ditches and swales.

Althon precast headwalls are designed to BS EN 1992-1-1 (EC2) and manufactured to BS EN 15258 & BS EN 13369 standards. Althon have been manufacturing headwalls since 1981 and have the largest range available in the UK. This includes SFA headwalls that meet Sewers for Adoption 7th Edition guidelines, for drainage outfalls that are to be adopted by the local Water Authority and comply with the Water Industry Regulations 2011.

Many Water Authorities have their own guidelines for the adoption of headwalls and associated drainage. Althon have designed headwall ranges to specifically meet these requirements. For example the Althon range of rectangular precast concrete outfalls conforms to the Severn Trent Water specifications. Althon angled headwalls meet the Environment Agency’s ‘Standard rules SR2015 No 27’.

Althon headwalls can be factory fitted with a range of accessories such as flap valves, penstocks, Kee Klamp® handrails as well as a selection of gratings and ladders. We cast openings in our headwalls for pipework from DN100 to DN2100 to standard or specified invert levels.

Use the Althon Headwall Specification Tool to identify the most appropriate headwall, or get in touch, we will be happy to assist.

If you require any assistance or more information please contact us by phone on 01603 488700 or by email sales@althon.co.uk

Headwall Specification Tool

Headwall Specification Tool

Use the Althon Headwall Specification Tool to help find the most suitable model and accessories for your project

BIM Available
Standard Precast Concrete Headwalls

Standard Precast Concrete Headwalls

Althon offer a cost effective alternative to in-situ structures for connecting pipework discharging into open water courses

BIM Available
Sewers for Adoption (SFA) Headwalls

Sewers for Adoption (SFA) Headwalls

Precast Concrete Headwalls designed to comply with ‘Sewers for Adoption’ guidelines

BIM Available
Rectangular Sewers for Adoption (RSFA) Concrete Headwalls

Rectangular Sewers for Adoption (RSFA) Concrete Headwalls

Althon RSFA Rectangular Precast Concrete Outfalls comply with Sewers for Adoption guidelines

BIM Available
Angled Precast Headwalls

Angled Precast Headwalls

Angled Precast Concrete Outfalls allow pipework entering a watercourse at an angle to be accommodated or for an Outfall to be situated on a bend in a river

BIM Available
Rectangular Headwall Range

Rectangular Headwall Range

Rectangular precast concrete outfalls with toe extensions to suit pipework up to 750mm ID

Precast Headwalls for Box Culverts

Precast Headwalls for Box Culverts

Althon Precast Box Culvert Outfalls are sectional in structure with rebated joints. This allows assembly on site around the box culvert

Precast Headwalls with Penstocks

Precast Headwalls with Penstocks

Precast concrete outfalls with factory fitted HDPE/8SS316L penstocks from 100mm - 1500mm as standard

Splayed Wing Wall Headwalls

Splayed Wing Wall Headwalls

Althon's SP range of precast ‘Splayed Wing Wall ’ outfalls are produced with a higher wing wall at the front of the apron

SFA Headwalls with Precast Steps

SFA Headwalls with Precast Steps

Althon SFA Precast Concrete Outfalls with Precast Steps and Handrails comply with the Sewers for Adoption 7th Edition guidelines

BIM Available
Swale Inlet Headwall Range

Swale Inlet Headwall Range

  • To suit up to 600mm pipework
  • Option for factory fitted with inline non-return valves

Benefits of Althon Precast Concrete Headwalls

  • Althon concrete headwalls are designed & manufactured to BS EN 15258 & BS EN 13369
  • Precast in controlled factory conditions
  • Manufactured to accommodate multiple pipe openings
  • Pipe invert level and opening can be specified to site specific requirements
  • Fast, easy and safe to install
  • No on-site formwork or shuttering required
  • We supply flap valves, penstocks and other flow control devices factory fitted
  • Supplied with Kee Klamp® handrails & fixing points cast in at the factory
  • We supply a range of outfall safety grilles and trash screens factory fitted
  • Ranges that comply with Sewers for Adoption Guidelines
  • Althon have a range of Severn Trent specification outfalls 
  • Designed to Environment Agency guidelines
  • Sewers for Scotland compliant