With the Electronic Manometric Switch, a Garden Pump can be easily converted to an Electronic Pressure Pump. The push-button has 3 functions: 1. It automatically switches the pump on when the water pressure falls and off again when the maximum pumping pressure has been reached. 2. The integrated Dry-running Safety prevents damage to the pump in the absence of pumping media. 3. The self-regulation automatically activates the cut-out pressure of the pump. The cut-in pressure (approx. 2.0 bar) is pre-adjusted in our factory. With a cable connection, the switch is easily connected to the pump. It has a 33.3 mm (G 1") mating thread.