Poly Drain Inspection Chambers & Clark Drain Inset Covers
110mm and 160mm Poly drain inspection chambers, manholes, access drain pits or rodding points in 320mm and 450mm diameter sizes, when installing access drainage points in paved areas use Clark drain inset covers, suitable for driveway loading, also manholes deeper than 1.2mtrs a shaft reducer is available to restrict inspection chamber access opening size to 350mm.