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Stainless Steel Automatic Flow Switch 1/2 Inch Electric Water Flow Control Switch for HVAC - China Paddle Water Flow Switch, Water Flow Switch | Made-in-China.com
Pressure Control Flow Switch | tradekorea
Amazon.com: Water Flow Switch Water Flow Control Switch Water Adjustable Flow Sensor G1/2 to G1 2 4 to G1/2 Thread Connector Sensitivity Adjustable Switch Water Switch Flow Sensor Switch Automatic : Industrial