Bathroom waste/downpipe spilling over

17 Feb 2011
Reaction score
United Kingdom
I have 2 waste pipes, one from the bath and one from the sink, which drop into a trap attached to a downpipe leading to our main drain. The downpipe from the gutter drops above the trap too. Whenever we have a shower or empty the bath, the water spills/splashes over the trap all over the floor, house wall and boundary wall. I have tried adjusting all the pipes so they hit the inside of the trap at different angles, but to no avail. Any help or advice will be gratefully received.


p.s. the toilet waste is not involved at all, as it has it's own separate pipe and drain.
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are you talking about a hopper ?
check its not restricted with leaves etc.
Just Googled "plumbing hopper" and checked images. Yes, it is one of those. Definitely not blocked. It is the angle that the water is hitting the inside of the hopper, making it splash all over the place.
Consider using a flexible connector to the end of your pipes...its easier then to guide the water into the downcomer.
Its a curious scenario....sometimes the water splashes out, sometimes it doesn't. Bizarre.
John :)
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Good idea - but if that don`t work and it`s a modern square -ish plastic hopper . Consider getting a reproduction .iron one - tapered :idea: like the victorian ones but made of plastic.

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