The Valve Will Then Open And Remain Open Until The Maximum Level Is Reached. *For Pump Fed Reservoirs: It Allows For A Single Level Or Variable Minimum And Maximum Levels Within Reservoir Or Tank. *Rainwater Harvesting; As A Backup Water Supply Control Valve, Providing Mains Water In The Even Of Demand Exceeding Rainfall. Tank Inlet Control Device With Variable Min And Max Water Level Settings. High Volume Water Inlet Control; Must Be Installed Horizontally. Features: * Working Pressure 55 1000k Pa (8 150 Psi) * Reduces Pump Run Time And Stop/Start Operations; Save Electricity And Increases Pump Life.