expansion 
soil stack
- Thread starter Humph
- Start date
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I'm with Kevplumb. Plastic pipe has a large coefficient of thermal expansion. When you empty your bath the pipe gets longer (or shorter for cold water) and something has to move. The more water you put down the pipe the greater the effect. All it needs now is for some part of the pipework to be a tight fit in a hole. You might also have noticed this phenomenon with plastic guttering as the sun warms it up.
The gurgling is another problem. Since the basin waste joins a, presumably horizontal, soil pipe I would suspect a partial blockage at this point.
The gurgling is another problem. Since the basin waste joins a, presumably horizontal, soil pipe I would suspect a partial blockage at this point.
kevplumb said:anti syphon traps
or find the partial blockage
think that was covered
felix
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thanx for your help and advice lads,,much appreciated...ill check basin pipe for blockage.....
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