Apparatus and installations for water supply and sanitary purposes, namely, showers, spray fittings in the nature of shower head sprayers, shower heads, shower handsets in the nature of shower heads and components thereof and hand held shower heads, and shower hoses; water jets for use in shower and bath cubicles and shower enclosures; water mixing appliances, namely, shower mixing valves and mixer faucets and water faucets for use in showers and bathrooms; thermostatic shower mixing valves; ...