[richeyb]

I believe in over kill, if it’s worth doing, it worth doing it right. I first by pass hot water heater and drain. Drain the fresh water holding tank. Insure each of the grey and black tanks are drained. Attach air compressor to fresh water inlet. Then blow out the pipes, not exceeding 50psi, opening each faucet until it’s all air. Remembering to also do washer and out side shower connection. Use short piece of hose connected to freeze, stick hose into pink jug, turn on water pump I then run the pink stuff through the pipes to each faucet I blew out. Add pink to each of the p-traps and into the black and grey tanks. Usually takes less than 2 gallons. I do not fill hot water heater or fresh water tank with pink. Never had an issue in the cold winters of Idaho.