Pedrollo TOP Multi-Tech 3 - Submersible Multi-stage Well Pump with Integrated Fixed Speed Control & Pressure VesselINSTALLATION & USEThe Pedrollo TOP-MULTI-TECH Submersible pumps are recommended for pumping clean water and liquids that are not chemically aggressive for the materials from which the pump is made.Because of their high efficiency and reliability, they are suitable for use in applications such as domestic water supply from reservoirs, tanks, or relatively deep wells, for drawing rainwater from cisterns to water gardens or for use in irrigation systems, etc.TOP MULTI-TECH pumps are fitted with an internal electronic device that starts the pump when the pressure of the system falls below 1.5 bar (eg. when opening a tap) and stops it when the flow falls below 3 liters per minute.It protects the pump:against dry running;against starting too frequently;against blockage: after long periods of pump inactivity the electronic device starts thepump every 48 hours for 10 seconds