Sewer gas from down stairs

[MasterPlumbersKeymaster]

I live in a newly built home and I smell what I think is sewer gas coming from my down stairs
powder room. What could be causing this and is there anything that I can do about. Our house is still
under warranty.
Thank you

[SylvanLMPParticipant]

Have your plumber do either a smoke test or a peperment test to make sure all vents are working properly.

Check all floor drains and fixture drains to make sure you dont have trap seal loses due to Oscillation, evaporation, capillary action, negative or positive pressures occurring through your vent/drainage system. Your plumber will know what these terms mean…Hurry
up before your warrantee expires. If you have any questions please ask

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SylvanLMP

[Author]

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