Last winter I had this happen for the first time. Had to hire a guy with one of them jets to free up the main line from house to septic tank. . He ran the jet from the septic tank to the house, and I was in the crawlspace at the time. I could hear the whole house flush when the jet sounded like was it right about to the foundation. The assumption was that the line had frozen there, although that seemedf like an odd cause because it had ever frozen in 15 years. But now it's blocked again, 9 months later and it definitely isn't frozen. I don't have any trees near there so roots seem an unlikely cause. It seems to be in roughly the same area (all I know for sure is its near or below the last fixture). I'm a bit worried there might be something else going on, but what? Can they send a camera in to diagnose it? I don't know if I even want to bother with trying to snake it I've checked on the tank side and water only trickles in to the tank when water is flowing in the house, but the toilet ad shower are backing up-just mentioning this to show its not a field problem.

current project is to run water lines to 6 camps. First camp is 250 feet from the lake, the next is 100 feet more, And there are 4 more camps further after that. They will all have goulds pumps to pull the water to their own camp. Should I run separate 1" black hose lines for all or can I run a 2" black hose line and tee off to each camp of course using a foot valve at the lake end for the application. Thanks for any help.