sewage back-up in basement shower
Please help. When we bought our 1600 sq ft. 1977 split-level with daylight (non walk-out) basement in 2000, we remember the previous homeowners telling us that every once in a while a funky smell would creep up through the downstairs shower, but that all we had to do was run the water for 10 minutes and it would disappear. My step-father, who is a plumber, said it might be a dry pea trap. Well, we haven't needed to run the shower all too often, but for the second time in about 7 months we have had sewage back-up into the shower. My husband thinks there might be a correlation with the washing machine running. The w/d sits right next to the shower in that bathrooom, and he is doing a load right now, as he is rinsing out the shower. The kicthen and upstairs bath both sit above the downstairs bath and the toilets use a common wall for incoming water and outgoing waste, as far as I can tell. This back-up also seemed to occur shortly after I used the upstairs bathroom. I cannot speak for the first time this occurred. Is it possible that the washer and the upstairs toilet overwhelmed the shower drain downstairs? Any thoughts, advice or suggestions would be greatly appreciated. Is this something covered my homeowners insurance? Thank you.
Well, we need to have the waste line snaked to the street. The plumber suggested it's possibly a tree root, but I think I figured it out. This started happening when we we began mudding our basement drywall project. I was using the bathroom sink as a work sink for rinsing drywall tools. I think I may have clogged the line. I guess we'll see after they snake it. It's either my drywall mud or something else.
My mother's house has had this issue for years, but no one could repair it permanently. When water is used or if the upstairs bathroom is used, it causes water and sewage to backup in the basement shower. When we had someone look at the drain years ago, they said the cause was from tree roots;however, the tree is located on the neighbor's property.