Most important thing for long airline runs is to keep the pump well above the airline so water does not drain back into the pump. Some use a check valve at the pump as insurance. Water that lies in the dips of the airline will freeze when the ground is froze thus causing an air blockage if the water completely fills the diameter of the pipe. Make sure the pump has a pressure relief valve if this happens.
Last edited by Bill Cody; 03/28/14 08:29 PM.
