Plumbing clogged with sludge that looks like wet concrete

[Debbie]

We have a 30 year old home with septic tank. Our basement toilet started gurggling and today dirty water and stuff started coming into the basement from the ejector pump. Not sure when that started happening. We dug three holes in the backyard today and figured out where the clog is. Betweent the kitchen and the septic tank, the pipe is filled with something that looks like wet concrete sludge. Has anyone ever seen anything like this before? We rented a power snake and used a two inch cutter, but haven't been able to clear it. Any ideas? Thanks, Debbie

[Mr_David]

Have you had your septic tank pumped out. Over the years not everthing breaks down and leaches out.
It's probably organic sludge that ahs accumulated over the years.
If the drain line is flat or even slightly back graded it does not drain properly.
Have the tank pumped then have a drain cleaning service with a high pressure jetter clean the lines for you. Then have them run a camera done the line to see if it is holding water. If it's holding water then it's not draing properly