Yes - its the same waste - how would I get access to that, would it have to be from below (in my case the trap is visible from the garage below - it pokes through the ceiling)?
Is there any chance it could be the base leaking even though theres no evidence of even a hairline crack? :?: - all...
i've just installed a new power shower using the existing porcelain base. Everything is siliconed and all tiling is done with waterproof adhesive & grout, however first time I switch on I have a wet floorbard next to the base.
When the old shower was in place the same floorboard was getting wet...