Electric motors (not for land vehicles); valves, taps, electric motors, generators and alternators; pumps and filter apparatus including filters for swimming pool water supply, recirculation pumps and apparatus and pumps and filters with fluid flow or pressure control; pump units and filtering machines and parts thereof in this class including filter units for attachment to pump outlets and water filters and change-over valves for water filters; fluid filter units for use with pumps; parts, fittings and accessories for these goods