Sewer smell in basement bathroom
I'm moving in a couple of months, but the house I'm renting right now has a really strong sewer smell coming from the shower drain, sink drain, and the drain for the washing machine, all in the basement. It's worse when the washing machine is running, but you can smell it pretty much all the time. All the drains run really slowly, so I plunge pretty often. When I plunge this black crud comes up and the smell is incredibly bad. I've mentioned it to the landlord and asked about getting a plumber, but he says it's harmless, it's just like that because the house is old, and that hiring a plumber would not help. Is he pulling my leg? :confused: He's left a lot of other "harmless" things unfixed in the house, and I'm thinking about reporting him when I move.