3 ms·
Most likely an S trap then. They are no allowed due to the probability of self siphoning. Not to say an S wouldn't, but it's improbable.
by ToFundorNot 6y ago
Most likely an S trap then. They are no allowed due to the probability of self siphoning. Not to say an S wouldn't, but it's improbable.
- downerending 6y agoIt was a p-trap with a non-obvious hole the size of a nickel. Became obvious the first time I used a plunger. :-P