anti freeze
I run mine through the pump untill no more water comes out, and then I pull antifreeze through the pump and through out untill all taps foam out pink, I also put some in my holding tank and pump it into my hot water heater untill it flows pink out the drain valve, and then poor some down each trap to displace the water in there or wet,dry vac to get the water out. I also leave every tap open so if there is a little water or Ice in still it can expand without breaking a line or faucet. Now is a good time, it only costs about 20 bucks and a few minutes.
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