Apparatus for steam generating, namely, steam generators; apparatus for cooking, namely, electric stoves, gas ranges; refrigerating apparatus, namely, refrigerating machines; drying apparatus, namely, industrial dryers for heating and dehumidifying; ventilating apparatus, namely, air conditioning appliances; apparatus for water supply purposes, namely, manually-operated plumbing valves; vessels, namely, spa bathtubs; apparatus and equipment for operating spa baths, namely, vessels in the natu...