I'm just plumbing in a replacement shower tray as part of my en-suite re-fit.
The old push fit waste pipe has been removed from the push-fit connector on the soil stack and was a tight fit. The new 40mm pipe courtesy of Homebase slides in much easier and I suspect may not be good enough to be water tight. It appears on inspection the old pipe is a slightly larger diameter.
I've changed the seal in the soil stack for a new one of the same type (borrowed from a 40mm external grade compression joint) with no improvement.
Now there are two obvious solutions I DON'T really want to adopt because the soil pipe and shower waste pipe is going to end up behind a tiled stud wall until it gets under the shower tray.
- Use a section of the old pipe into the soil stack and an in-line compression joint to the new pipe. The compression joint due to the position of the old shower would end up being well out of reach for any maintenance.
- Just clag the joint with sealant. Again, it would need major open wall surgery to get to to it if I ever need to pull the pipe back out for any reason.
The way I'd prefer to approach this is:
- A way of PERMANENTLY jointing the two types of pipe. I'm currently considering whether a 40mm solvent weld coupling will do the job (old pipe may not fit in + I think the pipes need to be ABS for it to work?) and no experience of the life span of the flexy couplings of the type screwfix do.
- Fitting an oversized seal if such a thing exists (tried to improvise one yesterday from a compression joint seal but no luck so far......)
Thoughts?
TIA Midge.