Agricultural irrigation units; Irrigation sprinklers; Irrigation spray nozzles; Dripper irrigation systems, comprised of Valves, filters and regulators; Lawn sprinkler systems comprising pumps, valves and filters; Drip irrigation emitters; Cultivation lamps and parts thereof, namely, high pressure sodium (HPS), metal halide, plasma, and light emitting diode (LED); Plumbing fittings, namely, valves; Water treatment apparatus for infusing irrigation water with liquid fertilizer; Liquid flow reg...