Sometimes my house starts smelling like sewage. After I flush the bedroom toilet and run water down the sink, it seems to start to dissipate. What is the problem? (BTW that bathroom is almost never used).
My guess is that since the bathroom is hardly used, the water in the toilet bowl and drain pipe of the sink is evaporating enough to let sewer gas into the house.
The water that sits in the bowl and sink drain act like a stopper, letting no gas past. If the water level drops just a little, the gas can escape into the house.
The remedy is to flush every other day, and run some water into the drain too. This should take care of the problem.
There is also a small possibility that the vent is clogged. If this doesn't eliminate the problem, let me know.
