Abstract: The present invention relates to an electronic controller and a computer-implemented method for a water storage system. The water storage system (10) has a storage tank (12) connected to a main energy source (24) and a main water source (14). The electronic controller (22) is provided with at least one sensor (32) to generate a sensor signal representing the state of the water in the storage tank (12). There is also an input device (38) for a user to input a command signal into the controller (22). A processor in the controller (22) receives the sensor signal, command signal, and source information relating to at least one of the main energy source (24) and main water source (14).

Abstract: The present invention relates to a centrifugal pump and a method of varying the properties of a centrifugal pump. The centrifugal pump has a pump housing, which in the preferred form comprises a front casing 22 and a back casing 24. The pump also includes an impeller 26. The present invention provides the centrifugal pump with one or more grooves 29 in the housing adjacent the impeller 26. The one or more grooves are adapted to removably receive a cutwater 28.

Abstract: The present invention relates to a method and system for correctly installing a flexible liner in a tank for water storage. The present invention in the preferred form relates to the use of a substantially rigid outlet (20) in the flexible liner (12) that is received in a tank aperture (22) when the liner (12) is correctly installed in the tank (14).