We've begun to smell something foul from under our floor and upon further investigation believe it to be the toilet waste pipe (after investigating the void space).
The pipe runs to two toilets, however we suspect the smell may be coming from a third segment that is upright and capped-off (looks a little like a modern plastic chimney).
We're not sure whether this could be a blockage or if the pipe had recently been dislodged / a build-up of stagnant water (we've only just moved here).
Any suggestions as to possible causes/solutions?
Many thanks
