R20-5-401. Applicability

This Article applies to all Boilers, Lined Hot Water Heaters, and Pressure Vessels operated in Arizona, except the following: 1. Boilers, Lined Hot Water Heaters, and Pressure Vessels regulated by the United States Government; 2. Boilers, Lined Hot Water Heaters, and Pressure Vessels operated in private residences or Apartment Complexes of not more than six units; and 3. Boilers, Lined Hot Water Heaters, and Pressure Vessels operated on Indian reservations. 4. A Lined Hot Water Heater that does not exceed any of the following: a. Heat input of 200,000 BTU/hr; b. Water temperature of 210° F; or c. Nominal water containing capacity of 120 gallons. 5. An electric Boiler that does not exceed either of the following: a. Tank volume of one-and-a-half cubic feet; or b. MAWP of 100 pounds per square inch or less, with a pressure relief system to prevent excess pressure.