Discovered today that the waste from the bathroom washbasin is absolutely full of clag - it's surprising it drained at all. Which isn't that surprising as it is running absolutely horizontally for about 3 feet. The sink is fitted with an S trap, from which the waste descends vertically, to a 90 degree bend, from which it goes horizontally, ending in what I think is called a conversion bend (90 degrees) which is pushed into some sort of adaptor which is in turn fitted into the top of a cap on a vertical soil pipe.
I went to a plumbers merchants thinking they'd be able to put me right - I was thinking perhaps something like a pair of 92.5 degree bends would work - but they'd never heard of them!!!!
Screwfix comes up with 92.5 degree bends and adjustable bends even - but one of them needs to be a conversion bend to push into the top of a soil pipe. Does such a thing as a 92.5 degree conversion bend exist?
Any thoughts?
TIA
Keith