Forum Discussion
Fifty4F100
Apr 12, 2015Explorer
My manual states to somehow regulate the air to 40 psi. Most compressors have a regulator and I hope mine is correct. Before starting turn on the farthest outlet - mine being the kitchen faucet. I turn on the cold 1st. Then open the air into the system. When that stops gurgling I'm reasonably sure its mostly empty. Then open hot side and close the cold. I always leave one open as I'm not sure my 16 year old pex lines will hold the psi. I work my way back to the closest point of the outside inlet which appears to be the bathroom sink faucet. It is easy to forget a spray line in the kitchen sink and the hand held shower line. Any water can pool in a sagging area and burst. And its easy to forget to blow through the toilet valve. And yes the "P" traps need to be winterized. The shower trap is especially low and sometimes not well insulated.
Good point about the pex fittings. Some are brass these days, but most use the much cheaper plastic fittings. The pex lines won't harden too much in the cold and will stretch to allow for the expanding ice. The harder fittings might not. And all it really needs to do is stretch the metal crimp and now its not holding tight enough.
Good point about the pex fittings. Some are brass these days, but most use the much cheaper plastic fittings. The pex lines won't harden too much in the cold and will stretch to allow for the expanding ice. The harder fittings might not. And all it really needs to do is stretch the metal crimp and now its not holding tight enough.
About Motorhome Group
38,769 PostsLatest Activity: Mar 31, 2026