The Roof Cleaning Institute Of America Training & Certification Forum
"Find A Certified Roof Cleaner Directory"

I winterize all my pumps with regular Prestone antifreeze. In Florida, I use a 50/50 mix of antifreeze and water, but in Oklahoma, I used straight antifreeze. During the winter, in Oklahoma, when I needed to go do a job I’d pump the antifreeze from my hot water PW into a 5gal bucket, use the PW to put 75-100gal of warm water in the tank, stick the pressure line into the top of the tank, leave the PW running to keep the water circulating, and off I’d go. When I was done, I’d (screen) filter the antifreeze from the 5gal bucket into the float tank and reload the pump and coil with it. Never had a problem.

John, if you do that, don't forget to tie your line off to something so it doesn't accidentially pop out of the tank. I used to use the whip that runs from the PW to the reel and tied it off to a tank leg.