We think alot alike Carol
. I've only "siphoned" to check for the "sediment" to which none was present. Not sure that works either but as Brian states- makes me feel better. No sediment came out.
You're definitely right and I mentioned this in a previous winterizing post, that a little water left in the wh tanks wont hurt if it freezes. It's water under pressure or contained in small areas- like the pumps, traps etc- that can cause damage.
Just to reiterate, Atwood has alum tanks to which wont "rust". In fact, if you read up on it from Atwood, they dont even recommend an "anode rod" be used. Steel tanks are a different story.
I still remove my HottRod (add-on electric heat unit) before leaving the campground and drain my wh just to keep from hauling around 50lbs extra lbs of water. This helps keep a watch on my HottRod anode and I can keep it cleaned off- calcium build-up or what have you. That's where the nylon plugs come in handy.
Originally Posted by Carol H
Well I am not sure that the little remaining water that is in the tank is a big issue as there is still a lot of room for expansion should it freeze, although I normally leave the drain plug out for the winter as well... never know