Precast Concrete Headwalls

Concrete headwalls, precast wingwalls, spillways and other precast concrete 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. Precast headwalls also prevent the surrounding bank from eroding and sloughing into any adjacent watercourse, for example; ponds, rivers, ditches and swales

Althon have the largest range of precast concrete headwalls available in the UK, with models that meet Sewers for Adoption guidelines, a range of rectangular models conforming to Severn Trent Water specifications with an array of wingwall profiles, backwall widths and heights as well as being able to offer bespoke precast outfall and wingwall solutions.

A headwall should be fitted to drainage pipes discharging into open watercourses. Althon precast outfalls & spilways can be factory fitted with a range of accessories such as flap valves, penstocks, Kee Klamp® handrails and a selection of gratings depending on the application.

We cast pipe openings into the back wall to suit the pipe material and diameter being used for ease of installation. We will also set the invert level as requested and draw for approval prior to manufacture if required. 

If you cannot find the headwall you are looking for please get in touch with us and we will be happy to assist. We are constantly uploading new drawings to our website and are confident we can provide an precast solution to meet your requirements.

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

Headwall Specifier

Headwall Specifier

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

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

Sewers for Adoption (SFA) Headwalls

Sewers for Adoption (SFA) Headwalls

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

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

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

Rectangular Headwall Range

Rectangular Headwall Range

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

Precast Headwalls for Culverts

Precast Headwalls for Culverts

Althon Precast 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

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 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