Bathroom plumbing oddity?

Author
Discussion

TheDoggingFather

Original Poster:

17,135 posts

208 months

Wednesday 28th February
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I present myself in front of the PH fountain of knowledge perplexed and confused.

Our bathroom has a weird problem, the bath will drain slowly, but without a problem then it goes through periods of not draining at all, you can attack with a plunger where it will occasionally fire water back through the sink plug hole but seems to make no difference whatsoever. You can stick a load of sink and drain unblocker, no change.

Then one day, it will start draining perfectly with no persuasion. I have zero clue why it does this, thoughts?

smokey mow

949 posts

202 months

Wednesday 28th February
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if the stack has an air admittance valve, then this is possibly sticking closed.

Ham_and_Jam

2,315 posts

99 months

Thursday 29th February
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We have a similar problem.

Toilet and bath waste go into the stack and we get a gurgling in the bath trap when the toilet is flushed. Toilet also slow to empty.

If the bath trap is empied then the gurgling disappears and toilet empties normally.

We have a stubby air admittance valve on the soil pipe and have been told it’s either a sticky valve and needs replacing, or a blockage further down the pipe / drains.

No one can seem to determine which is more likely, so I guess we’re going to try the cheapest and easiest first, get a drain guy out. Doing the AAV will be a bath out job with all the tiles being sacrificed in the process.

Do you have an AAV on yours?