lenr wrote:
I'm speaking of two pipes, one hot water, one cold water, that are tapped into lines running along under the water heater, that protrude down 10" under the bottom of the trailer, and are labeled low point drains. I also have a single line from the bottom of the fresh water tank used to drain it. The fresh drain is crossed link flexible PEX. It should handle some freezing. The low point drains are hard plastic probably not going to handle freezing. And, sticking out 10", I don't believe that they would not freeze down close to zero degrees. My concern is how do I prevent freezing and busting when I'm still camping in weather between zero and 32 degrees. I don't have a problem once the trailer is parked for winter full of antifreeze. Eliminating them eliminates busting from freezing, and I don't see why I need them to fill the system with antifreeze.
Empty PEX pipe will not freeze.