Got everything off. All I need to get things back together is a sharkbite coupling. Had to cut the cold water inlet line. I got the check valve out and gutted. I might just put it back together the way it is and worry about things next winter. If I know myself, I'll forget about it until the day I need to winterize and it won't be ready.
Question 1. If I use compressed air to blow out my lines, will I even need the check valve? I don't see a need for it unless I want to put antifreeze in the lines. I've never done that to this coach and we just had the "winter from hell" (sounds a little backwards!).
Question 2. How does a check valve here and nothing holding back water from the cold inlet keep water out of the tank?