About 3 weeks ago my father-in-law and I drove a sand point. We went down 24 feet and hit about 14 feet of water. We put the check valve on and ran Polly pipe about 60 feet to a pump house and screwed on a 1HP pump. It was a non-priming pump so we primed it up and it started pumping water! When we went to start another hose we lost pressure to everything. After about a dozen tries we thought maybe it was the check valve since when we would pitcher pump it...water would not stay at the top when we unscrewed the pump....After changing that and adding another check valve since it would still do it....we had no luck!!! Just wondering if anyone had any other ideas as what it might be? As of the moment I have someone checking out the pump to see if thats the problem!!! PLEASE HELP!!!!