Water storage tanks, namely, metal fluid storage tanks; pressurized storage tanks for well-water systems, namely, metal fluid storage tanks; metal water storage tanks and water pump control devices sold as a unit; metal valves not being parts of machines; metal cylinders for compressed gas, sold empty; metal pipe hangers; metal pipe clips; metal refrigerant recovery cylinders, namely, metal fluid storage tanks

Electromechanical controls for use in water pump systems; fire extinguishing apparatus; and expansion tanks for use in sprinkler systems for fire protection

Apparatus for heating and water supply purposes, namely, heating installations, hot water tanks, water pressure regulators for water installations, regulating accessories for hot water supply in the nature of metered valves; water storage tanks being parts of plumbing and heating and cooling installations, namely, hot water tanks, well water tanks, and water retention tanks; water pressure booster systems primarily composed of a pump and a diaphragm tank, as part of plumbing and heating and cooling installations; pressurized water storage tanks as a component of well-water systems; metal water storage tanks being parts of plumbing and heating and cooling installations, namely, diaphragm tanks and water pump control devices sold as a unit; expansion tanks for use in heating systems; valves for plumbing and heating and cooling installations, namely, thermostatic valves and pressure-reducing valves in plumbing and heating and cooling installations; water heaters; indirect-fired water heaters; shock suppressors for plumbing and heating installations; air vents, namely, air vents for hot water heating systems; air purgers, namely, air purgers for hot water heating systems; and air separators, namely, air separators for hot water heating systems