Hello, so our pump lost its prime and I can't figure out why. Its just a 1" line going to the bottom of a 25' well for a cottage. I replaced the pump with all new lines. Once I prime it, all it will pump is what ever I am putting in. It will not draw from the well. When I replaced the line in the well, I noticed that their was at least 15' of water down the well... What could be going on with this? I am lost!