We are gettng the smell of sulphur and a gurgling sound from our shower. We have checked the drain. Checked the vent and flushed the toilet but the smell does not seem to be connected to anything else and the vent to the outside is clear. We have tried Liquid Plumber and bleach to no avail. A plumber came in and cleaned out the drain but the smell and the gurgling continue. Can you help.
Thanks.