Hi, I own a 2002 Lunar Solar with an old Truma Crystal Mk2 submersible pump and connections. I have to wiggle the connection to make the pump start and when the tank fills the pump keeps tapping as if to build pressure. As it tries to build pressure it forces water out from the outside connection. I have checked o-ring on connector and played with the pressure switch but nothing seems to remedy it. Been thinking of replacing the connections on the caravan to the new pistol grip connections but not sure if that is the problem. Any ideas thanks.