[Craig2020]

After a shower in my master bathroom (upstairs), there seems to be a smell coming from the drain in the downstairs bathroom. I've ran water down it numerous times in case the traps became dry, but it never lasts? Any suggestions?

 

[jmon]

Possibly you have a partial clog further down the line or clogged/issue with a vent somewhere.

Something may be siphoning the trap dry allowing the sewer gas to enter, like when a toilet, washing machine another shower, etc., is draining. Just a suggestion.

 

[Craig2020]

Is this something I need a plumber for? Or is there a DIY method?

 

[jmon]

Before you call the plumber, you can do some basic stuff and see if it helps.

in the downstairs bathroom, flush the toilet and see if you hear a gurgling sound coming from shower drain. Then have someone stay there and someone flush the toilet up stairs and listen for the same sound.

If you hear a gurgling sound you have a partial clog somewhere. Start by using the good old plumbers helper, the plunger. Use the proper plunger for the toilet and proper straight plunger for the sinks and showers. It may be just a simple hair clog somewhere. Bathrooms are notorious for this.


If no luck, you may have to snake the line.