My sewer line is full of water again.
It seems that whatever is blocking it is under the shop. The plumber had suggested it may have a belly from the shop settling on top of it. That shop has. Even there for a long time, so it makes how long this problem has existed.
There wasn't a problem when I moved in, but the house had been empty. I called a plumber because the toilet in the half bath gurgled when I flushed the main toilet. The clean out didn't have water and they snaked from there to the house. Not to the sewer. Not much in there. I fixed the gurgle by adding a Studor valve under the sink in the half bath.
The problem of it holding water came later.
The plumber that was here didn't have a camera. I really want someone to find the true source of the problem, and not speculate.
If there's a belly under the shop then I'm assuming that the floor has to get cut and dug up so they can get to it. This has me wondering if they could just reroute it so it doesn't have to go under the shop? Does it have to maintain the original connection with the main sewer, or can that be relocated as well?