Possesed Bath

[Benway]

Hi.

New bath fitted including new solvent weld waste to the soil stack. Checked during first fix, no leaks. Works in the room under the bath room complete including a new ceiling so bath then installed properly. Checked for leaks all OK.

First proper bath someone has, water drained, we have a wet ceiling! Arrggghh.

Checked the trap and all plumbing in the bathroom under the bath and all OK, so it must be between where the waste pipe dives under the floor and the soil stack (need to now remove the ceiling).

The thing is during fault finding it only seems to leak when the bath is VERY full, if you just keep running the bath with the waste open no leaks at all. Is this related to the pressure of the waste water? Or one of the solvent welds faulty near the top of the pipe so only leaks when the pipe is full?

 

[terryplumb]

When you empty a near full bath the pipework will be carrying a great deal more water than when running taps with waste open ,and will therefore be more likely to leak at badly made joints.

 

[HERTS P&D]

Also, check the overflow is water tight.

Andy

 

[Madrab]

Also check the bath is supported well, a full bath is a heavy item and if it deflects the floor when full then that can put pressure on the pipework.

 

[Benway]

Thanks all.

Turns out it was coming from the bottom of the shower waste... Shower and bath waste T together before they reach the soil pipe. Shower has never leaked so I can only assume it was related to the pressure of water when the bath was emptying from full.

 

[Ian H]

Will you reinstate the ceiling with an access hatch?