Water coming from washer drain when shower is running
I just moved into a house that has a washer in the basement & showers upstairs. I've noticed water coming out of my washer drain pipe when the shower is running, other nasty tidbits have been seen coming from the pipe also.
The drain pipe is 3-4 feet up the wall in the recessed box.
Any insight as to how I may fix this smelly, nasty problem would be greatly welcomed.