Air conditioners; Air conditioning units; Air-conditioning apparatus for industrial purposes; Central air-conditioning installations for industrial purposes; Cooling domes; Cooling evaporators; Dripper irrigation systems, comprised of valves, controllers and filters; Evaporative air cooling units for domestic use; Evaporators for air conditioners; Feed water heaters for industrial purposes; Filtering units for water, steam filtering for removal of sediments; Heat exchangers; Heat exchangers for chemical processing; Heat pipes to cool heat producing components; Heat pumps; Heat sinks for use in heating, cooling and ventilating apparatus; Heating systems composed primarily of tubes, pipes and pre-assembled manifolds through which cold or low temperature water circulates; Industrial-water purifying apparatus; Irrigation spray nozzles; Lawn sprinkler systems comprising pumps, valves and filters; Metal cylindrical chamber and screen for use in filtering and removing settleable solids from liquid; Pipes for heating boilers; Plumbing fittings namely, cocks; Plumbing fittings namely, valves; Plumbing fittings, namely valves, balancers, pressure regulators, mixing valves, diverting valves; Regulating accessories for water supply, namely metered valves; Steam heating apparatus for industrial purposes; Steam radiators for heating buildings; Steam valves; Strainers for water lines; Thermostatic valves being parts of heating installations; Valves as part of radiators; Valves being parts of sprinkler systems; Valves for air conditioners; Water conditioning units; Water cooling towers; Water desalination plants; Water distillation units; Water distilling units; Water filtering devices, namely, water purification installations for waste water and sewage consisting of curtains and textile fabrics; Water filtering units for commercial and industrial use; Water purifying apparatus; Water purifying units, for potable water for commercial and industrial use