I have a shower drain in an older home and when I take a shower the odor is of sewage. I took the cover off the drain and cleaned it out with a snake and there was nothing on the end of the snake. It drains fine and never backs up. I was wondering what is causing the bad odor. It only smells when the shower is on. Advise?

Hello. The smell may be coming from the vent pipe being broken or cracked. Thanks Rodger

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Most shower odor comes from rotting hair matted in with grease from the soap. Try this. Remove the two screws holding the strainer. (TIP; put the screws in the soap dish before they get lost down the drain.) Shine a light down there and with a bent coathanger fish out any hair that may be hiding down there. Then pour a 1/2 gal. of bleach down into the trap and let it set over night. Next morning flush the mess down with 2 latge pans of boiling water, (this is important). The bleach will desolve the hair and make it slippery and the boiling water will melt the grease and get the mess out of your drain. Smell better now? Cheers TOM