Here's a video of my winterizing with antifreeze. I have a flush-pro installed, use a large container, small sump pump and 5 gallons of rv antifreeze..
After the temp reaches 180, I disconnect from the flush-pro and then use the same setup to flush the heater core and then refill the bottles for next year..
https://www.youtube.com/watch?v=UxaR...e_gdata_player
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