Originally Posted by ATVer
I open all drains and filter housing, air blow through all faucets, drains, etc individually, including the tank flushers, and pump anti freeze through the system. I like to leave the anti freeze in the system since the alcohol in it helps to disinfect everything. Also the water heater drain plug does not fully drain the water heater because it is not exactly at the bottom so I stuff the end of a towel into the drain plug hole for a few days to suck out any leftover water. This is not for a freeze concern but to reduce the rate of corrosion of the tank as it will stay wet all winter if left just drained.
I think many forget about the flush nozzles. If they freeze and break inside the tank you probably wouldn't even notice except they may not function as well.
Amen to this, do one or the other, not both. My independent service guy here in Iowa said don't bother blowing the lines out just do anti-freeze. Also, last time I hooked up a compressor (40 psi) to my system I had to replace the city valve since it knocked the o-ring off.