I'm winterizing this Saturday. I've decided to blow out the lines, first. Then add PG antifreeze until it runs out each outlet. Then because I hate the smell and taste in the spring, I'm going to open up my drains and empty all the lines so they don't sit filled up with the PG in them all winter. The residue that's left will protect everything from freezing up. The one thing I really worry about is the toilet water valve. Years ago when I was new to this stuff, I had a toilet valve freeze and crack. In the spring I ended up with water all over the floor when I filled my tank. Not doing that, again.
Duane