450mm internal diameter polypropylene manhole base, riser and 3.5 tonne square top polypropylene manhole cover. The base has 6 number ring seal sockets that accept 110mm drain pipe or fitting, 5 inlets and 1 outlet. The 300mm high riser is complete with sealing ring and sits snugly on the base. The 450mm clear opening square top cover is locked via 3 screws and load tested to 3.5 tonne driveway specification. The overall height is 700mm.
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