Using a hand pump siphon to winterize?

Lynnmor wrote:
I would caution those that pour anti-freeze in the fresh water tank if they don't know how much plain water is in the tank that the pump cannot pick up. In my case. the tank sagging between supports and the pump pick up port being well above the tank bottom, there was gallons of water remaining. With the dilution, wasted anti-freeze and considerable flushing in the Spring, it is a poor way to winterize.

Yep, it certainly isn't the best way. As you pointed out, most fresh water tanks don't lay perfectly flat and can cause problems. It also requires more anti-freeze before the pump will start pulling it from the tank.