Please review our FAQ - this may save you some time contacting us for support.
What manhole covers should I install on a driveway?
Polydrain recommends using a B125 manhole cover as a minimum specification for driveway use. Polydrain's manhole covers are designed for pedestrian use only (Class A15) and should not be installed on driveways.
What depths am I allowed to go up-to, using Polydrain's Inspection Chambers?
Depths should not exceed 1.2metres using the 450mm Inspection chamber and 0.6metres for the 320mm Inspection Chamber.