septic stench in laundry room
Every so often we get a whiff of septic in our laundry room and it is awful. I have been told by my builder that the trap needs water in it to seal off the open pipe that leads to the drainage. We poured in about a cup of water a few weeks ago, but I still notice the smell. The house is 2 years old, and it just started happening again, hadn't happened since we moved in. Anything I can do?