Water distribution apparatus and installations and components and fittings, namely, regulating accessories for water supply, namely, metered valves; plumbing and heating systems and their components and fittings, namely, manually-operated plumbing valves and thermostatic valves; water flushing installations in the nature of automatic flush valves for toilets, plumbing fixtures, namely, shower mixers, and heating and water supply units in the nature of hot water heating installations and structural fittings therefor; water filtering apparatus; water filters; magnetic filters in the nature of air filters for domestic use being for use in central heating systems; filters for use with apparatus for water supply; strainers for water lines; water treatment filters, namely, water filtration units; boilers being parts of central heating installations; heat accumulators; regulating and safety accessories in the nature of pressure regulators for water installations for water apparatus; water conduits installations in the nature of pressure regulators for water installations; water distribution installations, namely, faucets; sanitary apparatus and installations, namely, shower enclosures; heating installations; bath fittings, namely, bathtubs; solar collectors for heating apparatus; taps for pipes and pipelines being parts of sanitary installations; mixer taps for water pipes; pipes being parts of sanitary installations; thermostatic valves being parts of heating installations; regulating accessories for water apparatus and for water pipes