Plumbing vents (a network of pipes that carry air and gas outdoors through a pipe ... allowing harmful sewer gas to enter your home. A regular kitchen sink adjacent to a wall has a vent pipe ...

Sewer gas escaping from the P-trap or plumbing vent pipe could also be behind your stinky kitchen sink. But if you've ruled out stuck food particles, don't have a dry P-trap, clean your garbage ...