I live just north of Dfw and was wondering what should run in freezing temps. We have a waterfall , 2 sheer decent and a bubbler that all run off one side of a 3 way valve. The other side runs the returns. Also a booster pump runs off the main pump for the cleaner. Our pump and waterfall outlet are about the same elevation due to yard slope. Should the 3 way just set in the middle and let everything flow?
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