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Water Flow Switch HFS-15 SPDT Cooling System Paddle Water Flow Control Switch with 1/2-Inch Thread Connection, 220VAC 15A: Amazon.com: Industrial & Scientific
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Amazon.com: Hilitand 1/2" Water Flow Switch, HFS-15 Adjustable Thread Double Throw SPDT 220VAC 15A Water Flow Control 1.0Mpa : Industrial & Scientific
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