Issues With Drainage Smells

This is very often a summer issue and results from vacuum forming within the waste pipes because insufficient displacement air is being drawn in via the vent pipe. When this happens, it can begin to release foul smells

The cause of this is often when several different fittings (basins, shower and bath) flow into the same waste pipe before it reaches the soil stack, and the pipe becomes full (especially on long, shallow pipe runs). The effective way to counter this unpleasant problem is to fit anti-siphon traps.


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