Check Valve
I believe the problem here is with the small plastic one way check valve located on the bottom of the water faucet/pump.In my own experience, the first year I had my H260 in NY, for the winter, I was very careful about draining the fresh water system. However, I didn't realize that a small amount of water remains above the check valve (since it is a "one way" check valve) and freezes and cracks the plastic. This results in a loss of vacume, when you pump water, and leaks.Since then I always remove the check valves for winter storage and they have worked fine for the past five years. The check valves can be purchased directly from Hunter for $2.50 (that was five years ago).Regards,Captain BobS/V JoySea