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The book says it does but I can't see how.
I have an outside faucet on mine and I just hooked up the water inlet hose to it and turned on the pump and I ran anti freeze thru everything. Just put your valve to city water. That will let it run thru your filters and hose assy if you switch the valves for a few seconds then you know the tank inlet and solenoids are protected. I use a little more anti freeze but I know I'm protected. Just unscrew your whole house filter and dump it out when done. You don't even have to do that because it will be full of anti freeze
I'm sorry, I was thinking winterizing, But it will work the same for sanitizing
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