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New build apartment bath soil pipe trap doesn't seem to meet regulations


Metronome

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Hi, at the plumbing of my bath (new build flat) it appears that the soil trap seal is only 2" (as shown on pipe) instead of the 3" 75mm seal that building regulations H require for a connection to a communal soil stack. 

 

Also they've dug out the screed to fit the pipes which doesn't look right to me, I would expect some sort of sub floor to have been added to raise the bath? 

 

If anyone can provide any information I would greatly appreciate it and see if it's something I can raise on my new build insurance with Premier Guarantee 

 

Many thanks 

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Is it causing a problem? I think my trap is even shallower.

 

If the stack is open vented, and nothing else connects into the pipe between the bath and the stack then I think it will probably be fine. I think digging the floor out for the trap is OK as well. You could raise the bath on a plinth but that doesn't always look great.

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