Abstract: A filter to remove contaminants from potable water. The filter comprises a plurality of porous layers 15,16 forming a fluid path for the water to pass sequentially from the first layer 16 through the layers to the final layer. The first layer 16 is formed of a ceramic and/or sintered material and includes a virucide. Said first layer 16 is distinguishable from an adjacent second layer 15, wherein at least one of the first and second layers 16, 15 comprises a dye material.

Abstract: A split roller bearing comprising an inner ring including an inner race, an outer ring including an outer race, a cage mounted between the inner and outer races, said cage mounting t rollers which engage the inner and outer races, said inner ring and inner race, outer ring and outer race, and cage each comprising two substantially semicircular parts, the relevant semicircular parts being mounted end-to-end to provide a circular component, whereby the two semicircular parts of the inner ring and inner tapered race, outer ring and outer race, and cage, may be separated from one another to allow the roller bearing to be dismantled when worn without removal of the component supported by the bearing.