phenrichs wrote:
I live in South Dakota and it gets cold here. I drain all tanks. Drain water heater and leave the plug out. Turn bypass for the water heater. Use the bypass hose on the pump to pump anitfreeze directly from the jug through the system one faucet/opening at a time until all run pink. Once all the lines are taken care of I run enough through to make sure that there is sufficient antifreeze in the P traps and at least a half gallon in the waste tanks. No antifreeze in the fresh water tank.
That's how we've always done it, no problems. It takes a short time to complete, why take a chance?