Features Design products adopting magnet repulsion instead of springs, safe and reliable Permanent magnet filter removes impurities Water is not easily scaling, which is conducive to health Can be used a lot of times, long service life and good reliability Used in the instantaneous electric water heater, can save electricity power Description:Water flow switch is a very important part in the instant water heater. When there is a certain water flow through inlet, electric circuits is connected and water heater begin to heat. When the water flow stops, the water heater stops working. Magnetic type water flow switch controls switching on and off through the magnet, which is safe and reliable. Features: Design products adopting magnet repulsion instead of springs, safe and reliable.Permanent magnet filter removes impurities.Water is not easily scaling, which is conducive to health.Can be used a lot of times, long service life and good reliability.Used in the instantaneous electric water heater, can save electricity power. Specifications:Model: EFS-04P Color: Black Current: 3AVoltage: 220VPower: 10WPipe Thread Size: G1/2" (BSP)Diameter: 2cmAmbient Temperature: ≥1°COperating Temperature: ≤100°CRated Pressure: ≤0.65Mpa  Max. Pressure: ≤1.5Mpa Size: 2 x 5.2cm / 0.78 x 2.04"Weight: 26g(approx.) Package Includes: 1 x Switch Note: 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List