Thanks guys. I wish I would of done this last week. Right now it's -16F windchill and by tomorrow -31 wind chill . Or -8 temp wise. Either way I wish i would of done more to keep myself safe.
I bought RV brand new Monday and they ran water through and tested system then blew it out. That's how they recommended to do it. Which is blow it out which I do not agree with but too late