Sewer backing up but we have snaked all the way to the street
We have a 40 year old house. The sewer started backing up so we put a 1 inch flat snake (had a ball type tip) through an access valve close by in the wall(where the upstairs bathrooms drain) and pushed it through 102 feet, so it should have accessed the main on the street. That didn't work so we rented an electric snake (50 feet) to clear the floor drain (Where the sewer is backing up)that is 10 feet away from the wall drain and it went all the way through. Then we used the electric snake on the floor drain which is about 30 feet away (in the laundry room, it has a cap on it but when we removed the cap it would start backing up here as well) and it went all the way through. We have made sure the sewer vents on the roof are open by pouring hotwater down them until that backed up (heavy snow had us shovelling off the roof the week before) Help!!