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Sometimes finding the cause of leaking sewer gas, desperate measures are needed. When this happens, plumbers may use smoke to test for leaks in the waste and vent plumbing system.
Before this happens, the plumber has checked all of the P-traps in the home and replaced the wax seals on the toilets. Floor drains can be the unforgotten source as are some basement shower drains that have been plumbed without P-traps by homeowners.

Terry

• Smoke (click here)