Automatic Water Flow Switch G1/2 Brass Inline Pump Flow Control for Hot and Cold Circulation

HT120 FlowControl Switch for Small Pumps Overview A compact brass flow switch that automatically controls pump operation based on water flow. Designed for inline installation with standard G 1/21/2 connector, the HT120 activates a pump when flow reaches the starting threshold and stops it when flow ceases. Key benefits Automatic pump control: Starts pump when faucet or valve is opened and stops pump when flow ends, preventing unnecessary pump run time. Protects equipment: Reduces pump wear by eliminating dryrunning and frequent manual switching. Compact and durable: Brass construction offers corrosion resistance and stable mechanical performance in typical water systems. Low noise and smooth operation: Small volume design with reliable sensing mechanism for quiet operation. Specifications Model: HT120 Connector: G 1/21/2 Voltage: AC 220V 50HZ Peak current: 1.5A Working current: 0.5A Maximum power load: 200W (hot water 200W) Starting capacity: 67 L/min Minimum starting water pressure: greater than 0.03 KG Length: 6.7 cm / 2.64 inch Outer/inner thread diameter: 2.05 cm / 0.81 inch Material: Brass Color: Gold and green Package includes: 1 switch How it works When water flows through the switch, the flow pushes an internal plate to rotate. At a preset position the sensing assembly activates and closes the electrical circuit to start the pump. When flow stops, a spring returns the plate to its original position, the sensing assembly opens the circuit, and the pump stops. The design supports consistent switching at the stated flow and pressure thresholds. Typical applications Domestic booster pumps for sinks and faucets where automatic on off control is needed Small hot water circulation systems compatible with the stated hot water power limit RVs, boats, or garden pump setups that require reliable inline flow detection and pump control Installation and compatibility notes Intended for inline installation with G 1/21/2 threaded connections Designed to work with AC 220V 50HZ systems and pumps within the specified current and power ratings Ensure system flow meets the starting capacity of 67 L/min and minimum pressure above 0.03 KG for reliable activation Additional information Long working life with smooth operation and low noise Package contains one HT120 switch Color and surface grain shown in images may differ slightly from the actual product Manual measurements may cause small variations in listed dimensions Use this flow switch to add reliable, automatic control to small pump systems while reducing manual intervention and unnecessary pump operation.