11 Water-treatment systems and equipment, water-filtration equipment, reverse-osmosis equipment, anti-scalant equipment, irrigation equipment, water reclamation equipment, sewage and wastewater treatment equipment, and industrial effluent treatment equipment; water filters, water filter cartridges, and multi-stage water filters; housings for water filters; water tubing; fittings for water lines; valves for water lines, ball valves, and solenoid valves; water nozzles; plumbing components, nozzle filters, nozzle tees, and nozzle keys; water tanks; water pumps; mounting tools for water filtration equipment, water filter wrenches, filter housing tools, water filter installation tools, water filter mounting tools, tube cutters, pipe modification tools, pipe bending tools, pipe threading tools, pipe cutting tools, and plumbing wrenches; pressure gauges, water pressure compensating components, and water pressure adjusting components; electrical components, electrical enclosures, water-tight fittings for electrical enclosures, glands for electrical cables, LED indicator lights, and electrical switches; and tools, parts, and accessories for plumbing and water-treatment equipment