Has anyone ever tried the following?
I'm expecting a few below-freezing nights on my next trip with my travel trailer. It has a propane fueled hot water heater. It also has a hot-and-cold mix faucet on the outside. I can run a hose from that faucet into the fresh water inlet. If I keep the hot water heater on, trickle warm water from the outside faucet back into the fresh water, I figure I should be able to keep lukewarm water cycling through the plumbing. I may want to trickle some water from the kitchen and shower faucets (even though that water will end up in the grey water tank). As long as it doesn't stay below freezing for more than a few hours, I'm hoping this will prevent freezing.
Any comments? Thanks!