So my 2 check valves in the basement sump have gone bad. We had a power outage last week and they slowly leaked about 60 gallons of water through the return lines. Luckily the sump is drilled for a drip system so there was no flood. The challenge is the pump ran dry once the power came on before I could get to it. It’s pretty tight down there and it will require a major overhaul to put in new valves. For the time being I planned on moving the return lines in the main tank just about to the water level so if the power went out it would break the siphon. I have 2 sides each split 3 ways with locline. I raised one locline on each side. When I cut the pump it the 2 raised portions went above water but I was still losing water down the returns. Shouldn’t that work?