Smelly sinks & washing machine

I have a rotten egg smell coming out of my bathroom sink drain. Also sometimes when I do a load of laundry the smell comes out of my bathtub, bathroom sink, and kitchen sink and the whole house smells. We live in the country in a trailer house. We have city water. We also have what we call a gray water line. Thats what my machine water drains into. The smell isn't everyday. It just happens at random. Please help?

Try running some Bio-Clean down some of your house drains. Maybe even down that washing machine line. It can eat away at the gunk in your lines that may be causing a smell.

Bio-Clean does work well to remove the smell. Its something I have used for some time to solve this issue.

My thought is there is a problem with how your plumbing fixtures are vented. These odors should be stopped by the "P" traps in the drains at sinks and at the tub. If the waste piping is not vented properly a vacuum forms behind the waste water flowing down the drain. This vacuum sucks the "P" trap dry and allows odors to vent out of your sink drains etc.