Boatman wrote:
I am trying to locate the source of some odor in my bathroom. It is a "3/4
bath" and I suspect the odor is coming from the shower drain. I cannot see a
"trap" in the plumbing draining the shower (in the parts I could actually
visualize). Does plumbing draining a bathtub or shower have a trap like a
sink does? If it doesn't, does it seem reasonable this could be the source
of the odor (smells a little sewery)? The house is about 20 years old.
Thanks!

Boatman



Yes, both a tub and a shower will (should) have a trap.

If unused, the trap water *could* evaporate over (long) time.
Pour a bucket of water in to see if that helps.

Shower drains are prone to buildup of soap scum which
attracts very smelly mold. A bleach solution poured in
*might* help but you really have to get past the drain
screen with a brush to dislodge the scum.

Jim