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A while ago I replaced a leaky, corroded sink trap. That all appears to be fine, I can't find any leaks with it, and everything under the sink appears to be consistently dry.
The problem I have is that there appears to be a leak where the waste pipe out from the bottle trap meets the wall (which someone "helpfully" plastered or filled around so I can't see anything beyond the wall surface). I am assuming that it's because I disturbed the pipe when I pushed the new trap onto it, and that has messed up a seal somewhere, but it held for a while (more than a year) without any noticeable problem, so who knows.
As you can see from the attached image, the paint / plaster around where the pipe goes into the wall has been cracking, presumably from being wet and drying out over and over. There's never any noticeable amount of water but I checked earlier and it was slightly wet at the bottom where the hole in the wall is.
I don't know what's inside the wall, but I'm assuming it will be the same as in another bathroom, where someone had just slid the chrome pipe inside a PVC pipe and obviously realised it wasn't a tight fit, so wrapped the end in PTFE.
What are my options here?
I imagined that I would:
What's standard practice here for installation? Surely the PVC pipe should at least come to the wall surface and then I assume there are proper ways of joining these two up.
The problem I have is that there appears to be a leak where the waste pipe out from the bottle trap meets the wall (which someone "helpfully" plastered or filled around so I can't see anything beyond the wall surface). I am assuming that it's because I disturbed the pipe when I pushed the new trap onto it, and that has messed up a seal somewhere, but it held for a while (more than a year) without any noticeable problem, so who knows.
As you can see from the attached image, the paint / plaster around where the pipe goes into the wall has been cracking, presumably from being wet and drying out over and over. There's never any noticeable amount of water but I checked earlier and it was slightly wet at the bottom where the hole in the wall is.
I don't know what's inside the wall, but I'm assuming it will be the same as in another bathroom, where someone had just slid the chrome pipe inside a PVC pipe and obviously realised it wasn't a tight fit, so wrapped the end in PTFE.
What are my options here?
I imagined that I would:
- Chisel away around the pipe with a screwdriver or something so I can see what's going on
- If necessary, cut away some more of the plasterboard
- Identify where the pipe join is and see if it's the same PTFE join I found previously
- Presumably join it in some better way
What's standard practice here for installation? Surely the PVC pipe should at least come to the wall surface and then I assume there are proper ways of joining these two up.
