Our square plastic covers with frame are designed to cap the riser from a chamber base. They are available to buy in 320mm or 470mm sizes.
110mm Inspection Chambers at 320mm are suitable for depths of 600mm, the 470mm inspection chambers are suitable for depths of 3000mm.
The invert (depth) for these chambers and risers are:
320 BASE = 185MM
320 RISER = 140MM
470 BASE = 225MM
470 RISER = 235 MM
Our 110mm Underground Drainage Systems are designed for use in gravity drainage and sewerage applications, up to a depth of 10M. All of our drainage pipes and the majority of fittings are manufactured from Polyvinyl Chloride (PVC-U). The inspection chambers and gully grids are manufactured from polypropylene.
Manufactured to BS EN 1401-1 BS4660..2000 and compatible with the following underground drainage systems