Backwall Height

Backwall heights: 1080mm - 1300mm

Single or Multiple Pipe openings

Single or multiple pipe openings

Specifiable invert levels

Specifiable pipe invert levels

Maximum pipe size

Maximum pipe size:
750mm

Althon R18 Rectangular Angled Precast Headwalls are for outfalls discharging into ponds, swales, ditches, beaches and rivers. Rectangular precast headwalls come with the option of two thicknesses of toe, 300mm and 500mm, each of which is available in three depths. 

Althon manufacture R18 precast headwalls with three different wall profiles to suit the gradient of the bank as follows 1 : 1 slope, 1 : 2 slope and 1 : 3 slope.

All Rectangular Headwalls are cast with the opening in the back wall to suit the size and type of pipe being used at the invert level required.

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

R18A 01 2270 LH Angled Rectangular Headwall

R18A 01 2270 LH Angled Rectangular Headwall

  • Up to 600mm Pipework 
  • 1080mm Backwall Height 
R18A 01 2270 RH Angled Rectangular Headwall

R18A 01 2270 RH Angled Rectangular Headwall

  • Up to 600mm Pipework 
  • 1080mm Backwall Height 
R18A 01 2940 LH Angled Rectangular Headwall

R18A 01 2940 LH Angled Rectangular Headwall

  • Up to 600mm Pipework 
  • 1080mm Backwall Height 
R18A 01 2940 RH Angled Rectangular Headwall

R18A 01 2940 RH Angled Rectangular Headwall

  • Up to 600mm Pipework 
  • 1080mm Backwall Height 
R18A 05 2940 LH Angled Rectangular Headwall

R18A 05 2940 LH Angled Rectangular Headwall

  • Up to 600mm Pipework 
  • 1080mm Backwall Height 
R18A 05 2940 RH Angled Rectangular Headwall

R18A 05 2940 RH Angled Rectangular Headwall

  • Up to 600mm Pipework 
  • 1080mm Backwall Height 
R18A 05 3210 LH Angled Rectangular Headwall

R18A 05 3210 LH Angled Rectangular Headwall

  • Up to 600mm Pipework 
  • 1080mm Backwall Height 
R18A 05 3210 RH Angled Rectangular Headwall

R18A 05 3210 RH Angled Rectangular Headwall

  • Up to 600mm Pipework 
  • 1080mm Backwall Height 
R18A 10 3570 LH Angled Rectangular Headwall

R18A 10 3570 LH Angled Rectangular Headwall

  • Up to 600mm Pipework 
  • 1080mm Backwall Height 
R18A 10 3570 RH Angled Rectangular Headwall

R18A 10 3570 RH Angled Rectangular Headwall

  • Up to 600mm Pipework 
  • 1080mm Backwall Height 
R18B 01 2270 LH Angled Rectangular Headwall

R18B 01 2270 LH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height 
R18B 01 2270 RH Angled Rectangular Headwall

R18B 01 2270 RH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height 
R18B 01 2790 LH Angled Rectangular Headwall

R18B 01 2790 LH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height 
R18B 01 2790 RH Angled Rectangular Headwall

R18B 01 2790 RH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height 
R18B 05 2940 LH Angled Rectangular Headwall

R18B 05 2940 LH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height 
R18B 05 2940 RH Angled Rectangular Headwall

R18B 05 2940 RH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height 
R18B 10 3570 LH Angled Rectangular Headwall

R18B 10 3570 LH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height 
R18B 10 3570 RH Angled Rectangular Headwall

R18B 10 3570 RH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height