To eliminate persistent sewer gas odors in your home, you must systematically inspect and restore all plumbing vapor barriers. Start by pouring a full pitcher of water down every household drain—including guest bathrooms, laundry rooms, and basement floor drains—to recharge any dry P-traps that have lost their water seal. If odors persist, inspect toilet wax rings for leaks, clean out organic biofilm using enzymatic cleaners, and check the roof vent stack for exterior debris blockages. Verification: Ensure all P-traps maintain standing water to block rising sewer gases effectively.
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