I installed a new vanity and plumbing hardware. Now I'm having a sewer gas problem coming up through my vanity sink drain. I installed a new trap below the original waste line going out to the street in the same postion as the original.
So in theory since the trap is below the original waste pipe going to the street. The water in the trap should block or keep out the gas.
Also when I drain the sink filled with water it empties quickly and with no leaks. But the smell from the gas is temporarly high then diminishes.
What can I do to get rid of the gas smell?
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