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TACO 221-6 (1 1/4") UNIVERSAL CI FLO-CHECK
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$31.99
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Taco Flo-Cheks are used in a forced hot water heating system to prevent gravity circulation during periods when the boiler is hot but the space heating zone is not wanted. In systems with multiple circulator zones, Flo-Cheks allow heat to flow only into the zones that are calling for heat.