MCA Chapter 51

in effect

Miss. Code Ann. § 75-51-1 Pressure-temperature relief valves to be provided and installed; prohibited sales and installations.

All water heaters installed in any dwelling or in any other building within the state shall be provided with an approved self-closing (levered) water pressure relief valve and temperature relief valve or combination thereof. No individual, firm, corporation or business shall install any new automatic hot water tank or heater of one hundred twenty (120) gallon capacity or less without installing thereon a pressure-temperature relief valve so labeled by the manufacturer’s identification stamp or cast upon the valve or upon a plate secured to it. No individual, firm, corporation or business shall install, re-install or re-locate any existing automatic hot water tank or heater of one hundred twenty (120) gallon capacity or less without installing on such tank or heater an approved type water pressure relief valve and temperature relief valve or combination thereof. No individual, firm, corporation or business shall install, sell or offer for sale any relief valve, whether it be pressure type, temperature type or pressure-temperature type, which does not carry the stamp of approval of the American Society of Mechanical Engineers or the American Gas Association.

Miss. Code Ann. § 75-51-3 Specifications for and installation of relief valves.

Temperature and pressure relief valves, or combinations thereof shall have thermosetting of not more than two hundred ten (210) degrees fahrenheit and pressure setting not to exceed the tank or heater manufacturer’s rated working pressure. The relieving capacity of these two (2) devices shall each equal or exceed the heat input to the water heater or storage tank. Temperature type or pressure-temperature type valves shall be installed in the shell of the water heater tank or may be installed in the hot water outlet, provided the thermo-bulb extends into the shell of the tank, and in all cases installed at the highest practical point. For installations with separate storage tank, said valves shall all be installed on the tank and there shall not be any type of valve installed between the water heater and the storage tank. Temperature relief valves shall be so located in the tank as to be actuated by the water in the top one-eighth (1/8) of the tank served. Pressure relief valves may be located adjacent to the equipment they serve. There shall be no check valve or shut-off valve between a relief valve and the heater or tank for which it is installed. The outlet of a pressure, temperature, or other relief valve shall not be connected to the drainage system as a direct waste.

Miss. Code Ann. § 75-51-5 Installation or sale of certain untested devices prohibited.

No individual, firm, corporation or business shall install, reinstall, relocate, sell or offer for sale any hot water supply storage tanks or heaters of one hundred twenty (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 two hundred twenty-five (225) degrees Fahrenheit without deteriorating in any manner, and such tank or heater shall be so labeled by the manufacturer. 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 two hundred twenty-five (225) degrees Fahrenheit without deterioration in any manner, and such baffles or heat traps shall be so labeled by the manufacturer.

Miss. Code Ann. § 75-51-7 Markings on, and standards for, hot water storage hot water storage tanks.

Any storage tank hereafter installed for domestic hot water shall have clearly and indelibly stamped in the metal, or so marked upon a plate welded thereto, or otherwise permanently attached, the maximum allowable working pressure. Such markings shall be in an accessible position outside of the tank so as to make inspection or reinspection readily possible. All storage tanks for domestic hot water shall meet the applicable American Society of Mechanical Engineers or American Gas Association standards.

Miss. Code Ann. § 75-51-9 Chapter inapplicable to prior installations.

The provisions of this chapter shall not apply to water heaters installed prior to October 6, 1968, except with respect to re-installation thereof as provided in Section 75-51-1 hereof.

Miss. Code Ann. § 75-51-11 Penalties for violations.

Any person violating the provisions of this chapter, upon conviction, shall be fined not less than one hundred dollars ($100.00) nor more than three hundred dollars ($300.00), and each such sale, installation, or re-installation shall be a separate violation hereof if not effected in accordance with this chapter.