Ok guy thanks for any advice, here's my problem. Septic tank has been in the ground for 15 years. About 5 years ago the line coming out of the house to the tank itself had cracked. From the house to the tank is maybe 3 to 4 feet. The line coming out of the tank going to the house had dropped maybe a 1/2 inch and it made a clean crack all the way around. I patched around the crack and with the line still running down hill to the tank figured I was ok. Now(5 years later) the line has cracked again, same place and the line coming out of the tank has dropped maybe an inch. Still all down hill with nothing really to obstruct the flow so I patched it again with some black tape and put a small block under it which lifted the line up a ittle. Is that kind of brake normal for a 15 year system. With as much water as the tank holds and the weight of that I could see it settling a couple inches over a 15 year time. Should I have any concerns about where the water exits to the drain field? Thanks