After the dreaded ceiling damp patch, I have succeeded in raising a
portion of chipboard flooring and identified the problem as a leak
where the bathroom basin waste enters a short horizontal section of
110mm soil pipe at a boss connector. The toilet also connects at this
same boss, toilet in the top and basin waste at the side
t
Ob


The house is about 15 years old. The basin waste connector to the boss
had half fallen out. The connector is 40mm push fit and looks more like
a mini toilet pan connector with 3-4 rings of rubber which form the
seal.
Is the best course of action to try and source a new seal (any ideas?)
or clean the old one up and add some other form of sealant as well
before re-assembling. You may have some other ideas as well. The soil
pipe is under the floor and I am loathe to have to replumb the waste
from the basin as access to this is very poor.

Thanks for your time

John