Sanitary apparatus and installations, sanitary ware (including bath tubs, shower trays, bidets, shower cubicles, urinals (sanitary fixtures), water closets, toilet seats, sinks, flushing apparatus, flushing tanks, cisterns, wash-hand basins, squatting pan closets, fittings and installation fixtures thereof, bath fittings, bath installations, bath plumbing fixtures, water taps, cocks (faucets), water flushing installations, shower nozzle, shower head