Lloyd, make sure you bleed all the water lines, so that there is no air left in them, afterwards with the taps shut off the pump should stop once it reaches full pressure. The lines are the only thing in the trailers to hold the pressurized water, there is no "cushion tank" so you will find the pump will come on fairly soon after turning on the tap.
Shouldn't that turn itself off when max pressure is obtained and shouldn't I be able to use the faucet for a while without the noisy pump running? I just filled the tank for the first time on my new Trillium
. Does that have anything to do with the pump not turning off?