450mm Inspection Chamber 160mm Base

450mm internal diameter polypropylene manhole base with 4 number 110mm with main channel at 160mm. ring seal sockets that accept 110mm / 160mm underground drainage pipe or fittings, 5 inlets and 1 outlet. Complete with 3 socket plugs for blanking off any un-used inlets. Overall height is 238mm. Maximum depth allow by building regulations is 1.2 meters.