Backwall Height

Backwall height: 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 R20 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 R20 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

R20B 01 2390 LH Angled Rectangular Headwall

R20B 01 2390 LH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height 
R20B 01 2390 RH Angled Rectangular Headwall

R20B 01 2390 RH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height 
R20B 01 3330 LH Angled Rectangular Headwall

R20B 01 3330 LH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height 
R20B 01 3330 RH Angled Rectangular Headwall

R20B 01 3330 RH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height 
R20B 05 3050 LH Angled Rectangular Headwall

R20B 05 3050 LH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height 
R20B 05 3050 RH Angled Rectangular Headwall

R20B 05 3050 RH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height 
R20B 05 3390 LH Angled Rectangular Headwall

R20B 05 3390 LH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height 
R20B 05 3390 RH Angled Rectangular Headwall

R20B 05 3390 RH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height 
R20B 10 3690 LH Angled Rectangular Headwall

R20B 10 3690 LH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height 
R20B 10 3690 RH Angled Rectangular Headwall

R20B 10 3690 RH Angled Rectangular Headwall

  • Up to 750mm Pipework 
  • 1300mm Backwall Height