Sump pump check valve
My sump pump set up is outside. I have about a 4
1/2' lift. My question is: Do I really need check valves(I have 2 pumps installed)?
The discharge pipes(pvc) come up to 90 degree elbows then down a foot or so before running about 20' downhill so there is no chance of backflow into the pit. My thought is that if I put check valves in I will have to pull them out every fall to avoid freezing.