Sanitary apparatus and installations; sanitary installations; sink units; toilets [water-closets]; bidets; urinals being sanitary fixtures; bath tubs; shower pans; taps; taps for washstands; toilet bowls; toilet seats; cisterns; water flushing installations; lavatory installations; sanitary covers for toilet seats; vanity units being wash hand basins; vanity units incorporating basins [connected to the water supply]