OK, my stupid question for the... until my next one. Prepping trailer for upcoming trip. Have been working on shower faucet, so had water hooked up and subsequently tested all faucets in the rig. Days later, disconnected the water (which had been OFF at the source for a couple days) and moved trailer to my driveway. The aux pump is NOT turned ON, but when I turned on any of the faucets, water at first flowed like the supply line was hooked up! It continues to flow, slowing down, but I'm surprised at how much water keeps coming out with no pressure to drive it. It's still more than a trickle. Mind you, I haven't let it run and run until it stops because I don't want more water in the grey tank. I just don't recall it ever taking this long to relieve the pressure built up in the lines. It's probably been 1/2 gallon all together(?)... hard to tell. I can't make any other assumption other than this is 'normal' and I've never done this right after disconnecting the water... or just bad memory?