tr21
Senior Member
well one should be on the side where the drain comes out of the house. do you know where it turns and goes upstairs, if you had a good plumber hopefully he put a cleanout there and you can carefully open it up. if your toilets stop gurgling your block is upstream. you really should call your plumber , i built my own house from top to bottom and took pictures of all plumbing and elec. runs and will tell you plumbing venting is the only part that took me forever to syfer out. it it either a insufficient venting or ya'll are eating too much fiber and flushing pine logs down it....