Air conditioners; Equipment for treating groundwater and soil comprising distribution lines, distribution manifolds, drop tubes, well seals and blowers; Heating boilers; Heating systems composed primarily of tubes, pipes and pre-assembled manifolds through which cold or low temperature water circulates; Hot water heaters; Plumbing fittings, namely, bibs, cocks, traps, valves; Radiators; Rotary kilns; Tap water faucets; Water heaters