If your house smells like sewage despite all plumbing fixtures draining smoothly, the issue is typically caused by a dried-out P-trap in an infrequently used guest bathroom or floor drain, a cracked vent pipe in the attic, or a failed toilet wax ring seal. When a P-trap loses its water barrier, sewer gases vent freely into the home. Similarly, cracks in hidden vent stacks allow foul gases to escape behind finished walls without affecting water flow. Verification: Check every P-trap and floor drain in the house to ensure they contain standing water.
1 votes
Marked as accepted