water smells like sewer water
This is the second time I tried to post this, so forgive me if this is a repeat. I am a new blogger for this forum:
I recently ran a 150' clean water line to my barn in the back yard from our home. The line provides clean water and adequate pressure. The line runs into the barn, and fork
out to a 30 gallon hot water heater, and also forks on the cold water side to a washer downstairs, then upstairs to a toilet and sink. The hot water side only goes to the sink
All drain lines are properly vented, and no leaks have been found. The water in the house is fine, no problems with the odor.
What is happening is that the hot and cold water output in both the sink and washer smells like sewer water. I don't know where it could be coming from, unless it is because
the cold water feed to the toilet is directly above the washer connection. The hot water smells worse than the cold water, but we can notice the smell from both. The water
is clear in color, so no known contamination.
Is it possible that I need a backflow preventer on the cold water line to the toilet, and would this resolve this problem?
Interested in any comments.