The Rainsaver MK4E supplies clean rainwater from a rainwater tank via an automatic pressure system pump to toilets, laundry and garden taps in a household. Mains water is also connected to the Rainsaver MK4E as an automatic back up should rainwater level be too low, or if there is a power or pump* failure. *Should there be a pump failure, mains back up is achieved by turning the Rainsaver MK4E off at the power point. The low voltage float switch supplied prevents the pump from running dry and allows the automatic switch over to mains supply should the rainwater level in the tank be too low. The DAB Divertron 1200 is a high quality submersible pressure pumps with built-in integrated electronics, designed to automatically start and stop the pump. The pump is a light and compact high head submersible clean water automatic pressure system pump supplied wired and ready to install. Does not require a float switch and Does not require external controls.