Applications:assembled On A Pump For Automatic Water Supply Andeduce The Water Hammer. Free Of Maintenance Without Preload Of Air. Specifications:quietunning Operation. Noneturn Valve Built-in, Pressure Gauge, Pressure Switch And Electronic Control With Dryunning Function Integrated And Manualeset Button It Saves Electricity As Now As Soon As You Close Your Tab The Motor Will Be Turned Off That Means No Wastage Of Electricity.