Getting ready to take our 1980 international on its maiden voyage outside the driveway. I was checking out the water systems and after filling up my fresh water tank, and turning on the pump, I cannot get any water to comeout of the faucets. When I turn on the pump, it just runs and runs and I never get any water out of any faucet. I primed the system with city water, and the pump will not cut on when the swithch is on, but as soon as I open a faucet to releave some pressure and get some water, the pump starts right up, but I can get no more water after an inital trickle. I have read in another forum that this may be due to the fact that I may have a leak in the line from the fresh water tank that causes me to lose vacum. Are there any other valves that I should throw when changing from city to tank water? Guess I will have to stick to the city water for this trip, unless there is a simple solution that I am unaware of!!! Thanks for any ideas!