Hello friends, I have a problem with master bathroom. Strong smell almost like sewer smell. It's driving me nuts trying to figure it out also stressing me bc the smell seeps into bed room. I thought it might be mold but after tearing out two walls everything seems fine minus alot of cockroach poop. cleaned all that with no difference in smell. Now I have a different theory. House had to have new pipes installed several years ago b4 I bought house. Old Copper pipes now are still in house but not hooked up. Did they not connect new pipes in bathroom to vent correctly and how could I tell. Another theory is the old copper pipes not in use in wall don't seem to be capped off at all. I would hire a plumber but simply do not have the money. Please help