So I have a one valve system and a bad check valve that I'm going to replace. I have already taken one apart and then reassembled. That is when I bought another one. I was not clever enough to think of taking out the spring mechanism and just adding another valve. So next time it goes bad I won't buy another but will just add a valve and make a note in the owners manual!
Since I moved to Colorado I have both emptied the lines and pumped the pink stuff through. I even pumped it through before I closed the low point drains, leaving lots of antifreeze in my driveway and little in the pipes. At least I knew to close the water heater by pass valve.
I found that snow and ice can leak through seams in the coach that hard rains do not seem to penetrate. So I re-caulked and also bought a cover for the RV, but leaving heaters on inside actually seemed to make the problem worse in the overhead and cost plenty in electricity.
I bought more eternabond to cover the front seams entirely and put in new stainless screws and trim vinyl, but it became another project that went on the back burner when the leak went away after I re-caulked the seams. In the winter maybe because of the cover, in the summer nothing even in the wildest of winds and downpours.
In Arizona the very hot temps inside are probably as bad as the very cold temps in Colorado--if not worse. I don't have to remove anything that will melt in the heat now, just anything that will freeze in the cold!
