Well, this is what we think we did last year for anyone else's use. Found photos from last year of valves we turned when winterizing: two. Apparently, we turned the valve for winterizing and one of the other valves, the one near the floor. We thought we only had two valves to turn but there are three. Husband had no recollection of turning a valve for winterizing and neither did I, apparently because we thought it was a hot or cold water valve.
We did not use six gallons of anti-freeze or near that last year so did not fill the hot water tank. Seems we missed a valve though. Got all three this year.
On the 19', we had only had two valves to turn. 21' came with winterizing tube already on the water pump as we had ordered it. We previously did not run anti-freeze through the pump.
Cathy. Floating Cloud
"Live in the sunshine, swim the sea, drink the wild air.... "