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 Water burst in toilet sink
Author: m.v.Sawant (Non-US)

My home is on second floor in a seven story building. Whenever flushing happens on seventh floor there is water burst in sink.
I have tried following to fix this problem
1 - Changed sink pot and underlying pipe to give it slope.
2 - provided gas outlet to drainage pipe.
Problem is still there.
Now plumber is now suggesting to convert t joint into y. Will that work.

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 Re: Water burst in toilet sink
Author: bernabeu (SC)

yes, but it may create OTHER problems as you have now created an "S" trap which could siphon easily

therefor

you should NOT follow that advice

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

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