Originally Posted by petey
just woke up 378 from winter, put plug in water heater tank, and hooked water up to motor home, turned water on city water and cold side was good and clear, hot side had a lot of foam, and I turned all valves on back side of water heater tank and there ok. is this normal never seen this before.
I have had the same issue - I have solved it by flushing the hot water tank (let your hot water faucet run for a long time without the hot water heater turned on) so all antifreeze is removed and then disinfecting the water system with Chlorox. I have found that either antifreeze or "dirty" water will cause the foaming.
I also should note that I now flush all anti-freeze from the system BEFORE opening the water heater bypass valves so no anti-freeze gets into the hot water tank.