North Carolina General Statutes Chapter 66. Commerce and Business § 66-27.2. Certain hot water supply storage tank or heater baffles, heat traps, etc., to be tested before installation or sale

(a) No individual, firm, corporation or business shall install, sell or offer for sale any hot water supply storage tanks or heaters of 120-gallon capacity or less which utilize dip tubes, supply and hot water nipples, supply water baffles or heat traps that have not been tested to withstand a temperature of 400 degrees Fahrenheit without deteriorating in any manner, and such tank or heater so labeled by the manufacturer.

(b) No individual, firm, corporation or business shall install, sell, or offer for sale any water baffles or heat traps, which are not constructed and tested to withstand a temperature of 400 degrees Fahrenheit without deterioration in any manner and such baffles or heat traps to be so labeled by the manufacturer.