I have noticed some foul "raw sewage smell" coming from my downstair bathtub (with standing shower) after the shower is turned on for about 30 sec or so.
I have tried the following tricks based on the info I got on the internet, but it does not seem to permanently fix the problem:
(1) Poor liquid bleech down the drain, let in sit over night and poor HOT water into the drain. This only worked for few days, and that foul smell came back. (2) Snaked thru the drain hole and passed the P-trap to push any hair or resedue built-up. I did that, and I did not notice any different at all !!
Any idea or suggestions are ver appreciated ,
Thanks in advance
JIMMY