FITTING ASSEMBLIES FOR SOLAR PLANTS, NAMELY, SOLAR WATER HEATER FITTINGS, NAMELY, BIBBS, COCKS, TRAPS, VALVES; FITTING ASSEMBLIES FOR HEATING BOILERS, NAMELY, BIBBS, COCKS, TRAPS, VALVES; [ HEATING FACILITIES, NAMELY, HEATING FURNACES, SOLAR HEATERS FOR SWIMMING POOLS, ] SOLAR HEATERS FOR HOT WATER, [ SOLAR COLLECTORS FOR HEATING HOT WATER, ] SOLAR WATER HEATERS, HEATERS USING SOLAR ENERGY [ AND SOLID FUEL ] FOR HEATING WATER