I second this. Try filling all drains and pipes with water. Grab pitchers, fill them up, and empty them down the drains, you may need to do this every few weeks as the water evaporates out of the pipes.
If for some reason you only have straight pipes down to a source you can't get to, try installing P traps if you can so water keeps the air from the sewers from coming up your pipes/drains and into your bathroom.
GiraffeAnatomy t1_ixpbg1i wrote
Reply to comment by Ni987 in Bathroom smells. Plumber's next step would be to seal. Any unconventional wisdom to look at? by otr_otr_otr
I second this. Try filling all drains and pipes with water. Grab pitchers, fill them up, and empty them down the drains, you may need to do this every few weeks as the water evaporates out of the pipes.
If for some reason you only have straight pipes down to a source you can't get to, try installing P traps if you can so water keeps the air from the sewers from coming up your pipes/drains and into your bathroom.