Man u gota give more info than that upstairs/downstairs,trough wall/through floor. Lead? Plastic? Castiron. inside/outside? What else if anything go's in the same drain
THe toilet is downstairs, Plastic pipe dropping into floor. it turns through 90degrees and goes outside into main drainage system (under manhole cover). The total length to drain is about 10 feet. THANKS
If the floor is timber then i cut would back the pipe under the floor & get a 110mm double socket coupling & cap end to put on. If the floor is cocrete cut it flush with the floor & go to a good builders merchants & but an internal rubber reducing bush 110mm-40mm & get a 40mm cleaning eye. Fit both into the pipe 30mm into the pipe & then cement over.
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