When you flip the "winterizing" valve, the water pump switches from sucking water from the fresh water tank to the winterizing hose. When flipping, the fresh water tank is off and the winterizing hose is on.
Flip the water heater into by-pass so you won't be sucking 6 or 10 gallons of antifreeze into the water heater.
FYI, it's often asked how do I pump bleach into my fresh water tank to sanitize it. Well, once you master the winterizing process, you can use the winterizing method to sanitize your water lines also. Just add a cup or two of bleach to a bucket of water, and suck the water up through the winterizing hose. You can also add bleach to the fresh water tank this way too.
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2019 Montana High Country 375FL
2014 Chevy Silverado Duramax, 6.6L Dually
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