Folks, I was winterizing Our-Pod today and was blowing out the water lines. Heard gurgling in the water heater, so I unscrewed the anode. I was promptly covered in water and bits of corroded anode. Imagine a fairly normal looking guy sopping wet with white bits adhered everywhere!

Lesson learned: isolate the water heater before blowing out water lines with air. Not only can you avoid my wardrobe malfunction, but you can avoid over-pressurizing a water heater and splitting its seams. I didn't do that because I am conservative in the application of pressurized air, but it could have happened.
My darling wife managed not to laugh out loud when I appeared in my newly acquired layers. She's had quite a bit of practice not laughing at me. She did say "bless your heart" (see footnote).
Doug, might want to make some sequence recommendations in the online manual, thanks.
Happy Winterizing, Jim
Footnote: Southern translation at http://www.urbandictionary.com/define.php?term=Bless+your+heart.