Costway EP21592 is a garden pump designed to maintain the required water pressure in your water supply system. It features an elastic tank that holds the pressurized fluid and a pressure switch that automatically turns the pump on and off to maintain the desired pressure. The pump is capable of delivering a maximum pressure of 4 bar and has a run/stop function to maintain the desired pressure in the water supply system. It also comes with safety features such as an RCD for increased electrical safety and a warning against using it in wet or damp locations.