Don’t seal yet. I would do a smoke test; that is, if they are available in Spain. Essentially banana ( or other scented) harmless smoke dropped in your vent pipe. We call them stink pipes on roof. You’ll know immediately where the sewer gas leak is coming from. Just did this myself recently and immediately saw smoke coming out of the wall as well as from under toilet. Re-seating toilet was easy, but also had to tear up wall. Found that only one side of vent pipe was capped and the other was wide open. That t can sometimes pop off or get knocked off when snaking the line.
I tried literally everything before this fix. 3 plumbers just scratched their heads. They were all sure it was a dry ptrap. Did the bleach, vegetable oil, calking etc.
I would say that if the sewer gas smell is big, then your problem is most likely big as well.
Good luck.
Mediocre_Pool_Rocket t1_ixns29l wrote
Reply to Bathroom smells. Plumber's next step would be to seal. Any unconventional wisdom to look at? by otr_otr_otr
Don’t seal yet. I would do a smoke test; that is, if they are available in Spain. Essentially banana ( or other scented) harmless smoke dropped in your vent pipe. We call them stink pipes on roof. You’ll know immediately where the sewer gas leak is coming from. Just did this myself recently and immediately saw smoke coming out of the wall as well as from under toilet. Re-seating toilet was easy, but also had to tear up wall. Found that only one side of vent pipe was capped and the other was wide open. That t can sometimes pop off or get knocked off when snaking the line. I tried literally everything before this fix. 3 plumbers just scratched their heads. They were all sure it was a dry ptrap. Did the bleach, vegetable oil, calking etc. I would say that if the sewer gas smell is big, then your problem is most likely big as well. Good luck.