Backwall Height

Backwall heights: 800mm - 2350mm

Single or Multiple Pipe openings

Single or multiple pipe openings

Specifiable invert levels

Specifiable pipe invert levels

Maximum pipe size

Maximum pipe size:
1500mm

Althon Sewers for Adoption precast headwalls should be used when part of a Section 104 Agreement and the sewers are to be adopted once completed by the local Water Company. The materials used and installation must comply with the ‘Sewers for Adoption’ guidelines.  Althon precast concrete outfalls offer a cost effective alternative to in-situ structures for connecting pipework discharging into open watercourses.

There are four sizes of Sewers for Adoption concrete outfall models available, catering for pipe sizes up to and including 1500mm. Each size of SFA model comes with three depths of toe and four back wall heights offering wing wall profiles to suit most applications.

Althon Sewers for Adoption precast concrete outfalls are cast to suit the diameter and type of pipe being used and can be provided with fixings cast in at the time of manufacture to accommodate gratings, trash screens, flap valves, penstocks, ladders, Kee Klamp® handrails and flow and depth monitoring equipment.

Our Sewers for Adoption compliant outfall range is available with toe extensions either 300 or 500mm thick with depths ranging from 450 to 1000mm. We also manufacture Sewers for Adoption compliant outfall safety grilles suitable for our products as well as other third party concrete outfalls.

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

Brochures and Datasheets

BIM Available
SFA6 A Headwall

SFA6 A Headwall

  • Up to 300mm Pipework
  • 750mm Backwall Height
  • SFA Compliant
BIM Available
SFA6 B Headwall

SFA6 B Headwall

  • Up to 300mm Pipework
  • 990mm Backwall Height
  • SFA Compliant
BIM Available
SFA6 C Headwall

SFA6 C Headwall

  • Up to 300mm Pipework
  • 1180mm Backwall Height
  • SFA Compliant
BIM Available
SFA6 D Headwall

SFA6 D Headwall

  • Up to 300mm Pipework
  • 1470mm Backwall Height
  • SFA Compliant
BIM Available
SFA10 A Headwall

SFA10 A Headwall

  • Up to 300mm Pipework
  • 800mm Backwall Height
  • SFA Compliant
BIM Available
SFA10 B Headwall

SFA10 B Headwall

  • Up to 500mm Pipework
  • 1040mm Backwall Height
  • SFA Compliant
BIM Available
SFA10 C Headwall

SFA10 C Headwall

  • Up to 600mm Pipework
  • 1230mm Backwall Height
  • SFA Compliant
BIM Available
SFA10 D Headwall

SFA10 D Headwall

  • Up to 750mm Pipework
  • 1520mm Backwall Height
  • SFA Compliant
BIM Available
SFA15 A Headwall

SFA15 A Headwall

  • Up to 750mm Pipework
  • 1300mm Backwall Height
  • SFA Compliant
BIM Available
SFA15 B Headwall

SFA15 B Headwall

  • Up to 1050mm Pipework
  • 1650mm Backwall Height
  • SFA Compliant
BIM Available
SFA15 C Headwall

SFA15 C Headwall

  • Up to 1200mm Pipework
  • 2000mm Backwall Height
  • SFA Compliant
BIM Available
SFA15 D Headwall

SFA15 D Headwall

  • Up to 1200mm Pipework
  • 2350mm Backwall Height
  • SFA Compliant
BIM Available
SFA20 A Headwall

SFA20 A Headwall

  • Up to 750mm Pipework
  • 1300mm Backwall Height
  • SFA Compliant
BIM Available
SFA20 B Headwall

SFA20 B Headwall

  • Up to 1050mm Pipework
  • 1650mm Backwall Height
  • SFA Compliant
BIM Available
SFA20 C Headwall

SFA20 C Headwall

  • Up to 1200mm Pipework
  • 2000mm Backwall Height
  • SFA Compliant
BIM Available
SFA20 D Headwall

SFA20 D Headwall

  • Up to 1500mm Pipework
  • 2350mm Backwall Height
  • SFA Compliant
SFA27 A Headwall

SFA27 A Headwall

  • Up to 750mm Pipework
  • 1300mm Backwall Height
  • SFA Compliant
SFA27 B Headwall

SFA27 B Headwall

  • Up to 1050mm Pipework
  • 1650mm Backwall Height
  • SFA Compliant
SFA27 C Headwall

SFA27 C Headwall

  • Up to 1500mm Pipework
  • 2000mm Backwall Height
  • SFA Compliant
SFA27 D Headwall

SFA27 D Headwall

  • Up to 1800mm Pipework
  • 2350mm Backwall Height
  • SFA Compliant
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