Hi, I would appreciate any possible solutions to my fresh water tank not filling up on my Parker 325. There appears to be an air lock or even an obstruction about 12" down from the deck fitting/pipe. Water from the hose simply overflows up the pipe. Nothing is going into the tank. I have bled the system and run the tank dry both to no avail. Any ideas of what is wrong and how to fix this problem please. Simon Quantrill Kerenza