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1995-1999 Dodge & Plymouth Neons
Home Improvement
Plumbing
Pollution

Can a clogged vent cause a raw sewage smell?

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Wiki User
September 17, 2014 6:55PM

To test for a blocked vent, plug the sink or tub. Put at least 2 inches of water over the plug. If the smell ceases, you have a blocked vent. The smell is caused by methane gas, which can cause many health issues.