1. (a)

   1. (1) All domestic and commercial liquefied petroleum gas consuming appliances except ranges shall have their correctness as to design, construction, and performance certified as follows:

      1. (A) Tested and listed as approved for use with liquefied petroleum gases by the:

2. (i) American Gas Association;

   1. (ii) Underwriters Laboratory, Inc.; or

      1. (iii) Any other nationally recognized testing laboratory approved by the Liquefied Petroleum Gas Board and bearing their approval seal for use with liquefied petroleum gases; and

      2. (B) Domestic and commercial ranges shall:

         1. (i) Have their correctness as to design; and
         2. (ii) Bear the manufacturer's seal or label designating that the appliance is for use with liquefied petroleum gases.

   2. (2) Exception.

      1. (A) Conversion of manually controlled domestic ranges and space heaters from natural or manufactured gas use to that of liquefied petroleum gases shall be permitted only by qualified dealers who have been issued a permit.
      2. (B) The conversion of new stoves and stoves with automatic controls, as well as the conversion of floor furnaces, hot water heaters, or any other continuous-burning appliances, regardless of type, is prohibited unless the conversion is authorized by and in accordance with the manufacturer's instructions.
      3. (C) The American Gas Association or the Underwriters Laboratory, Inc. seal of approval for use with liquefied petroleum gas as authorized and furnished by the manufacturer shall be attached at the time of conversion.

3. (b) All liquefied petroleum gas consuming appliances for use with industrial systems such as rice mills, cotton gins, sawmills, etc., shall have their correctness as to:

   1. (1) Design;
   2. (2) Construction; and

   3. (3) Performance.

      1. (c)
   4. (1) Suspended type unit heaters shall be safely and adequately supported with due consideration given to their weight and vibration characteristics.

   5. (2) Hangers and brackets shall be of noncombustible material.

      1. (d) All hot water heaters shall be vented to the outside air or into an effective flue.

4. (e)

   1. (1) Each hot water heating appliance shall be equipped with an approved type pressure relief valve having sufficient capacity to match the gross heat output of the appliance.
   2. (2) The discharge capacity as well as the set-to-discharge pressure shall be shown on the valve.
5. (f) Where a temperature relief valve is used there shall also be a pressure relief valve installed having sufficient capacity to match the gross heat output of the appliance.
6. (g) It is recommended that a combination temperature-and-pressure relief valve be used with the AGA water rating on the temperature side and the steam rating on the pressure side of the valve.

7. (h) Temperature or pressure relief valves or combination thereof for water heating systems may be provided with a suitable pipe or other metal conduit for proper disposal of waste water.

   1. (i) Automatic shutoff valves, one hundred percent (100%) type, shall be installed on all appliances where the appliance is in continuous service, such as water heaters, boilers, etc., or where such valves are considered necessary by the board.
8. (j) Hot water heaters and other continuous-burning appliances may be installed in compliance with 15 CAR § 270-122(b).

9. (k)

   1. (1) Appliances of more than forty thousand British thermal units (40,000 BTU) input capacity, installed in public buildings such as schools and churches, but not limited to, shall be:

      1. (A) Equipped with one hundred percent (100%) shutoff valves; and
      2. (B) Fastened to the floor and properly vented to the outer air.

   2. (2) All appliances installed in the bedrooms of hotels, rooming houses, tourist courts, and cabins for the use of transients shall be:

      1. (A) Of the completely enclosed, vented type; and

      2. (B) Equipped with automatic one hundred percent (100%) type shutoff valves.

         1. (l)

   3. (1) All appliances used for domestic purposes having an input capacity in excess of fifty thousand British thermal units (50,000 BTU) per hour, shall be:

      1. (A) Equipped with a one hundred percent (100%) safety shutoff valve; and
      2. (B) Connected to an effective flue.

   4. (2) The manually controlled range is exempt from this provision.

      1. (m) Every appliance shall be checked and adjusted after installation to ensure proper and safe operation, and the customer instructed in its safe operation.
10. (n) Appliances shall be adequately supported and so connected as not to induce any stress in the connection.
11. (o) No appliance shall be installed in a room in which the facilities for ventilation do not permit the proper combustion of the gas under normal conditions of use.
12. (p) A gas valve or shutoff, which constitutes the only means of gas control, shall be easily accessible and within convenient reaching distance when lighting the burner.
13. (q) No device or attachment shall be installed on any appliance which will in any way impair the combustion of gas.
14. (r) All appliances shall be installed as approved without alteration, extensions, or changes of any kind.

15. (s) Floor furnace pits.

    1. (1) Where excavation is necessary to provide proper clearance for the installation of floor furnaces, the depth of the excavation shall be such as to provide six inches (6”) clearance below the bottom on any combustion air opening or draft hood relief opening and twelve inches (12”) horizontal clearance on all sides having a combustion air opening or draft hood relief opening, except the control side which shall have an eighteen-inch clearance.
    2. (2) The sides of the pit should be sloped at a forty-five-degree angle.
    3. (3) A trench the entire width of the furnace pit from a point at ground level on the windward side of the house sloping to the bottom of the pit and up to ground level on the leeward side of the house, shall be provided for cross ventilation.
    4. (4) Openings in the sides of the house at ground level shall be provided at trench locations of not less than two hundred square inches (200 in²) in area.
    5. (5) In cases where it is practical, a drain may be installed in bottom of pit so the gases may be dispelled above ground level outside of the building and this will be considered a satisfactory means of ventilation.
16. (t) Gas shall not be turned on until the appliance and its connections have been tested and found free of leaks.

17. (u)

    1. (1) If a sediment trap is not incorporated as a part of the gas utilization equipment, a sediment trap shall be installed as close to the inlet of the equipment as practical at the time of equipment installation.

    2. (2) The sediment trap shall be either:

       1. (A) A tee fitting with a capped nipple in the bottom outlet; or
       2. (B) Other device recognized as an effective sediment trap.
    3. (3) Illuminating appliances, ranges, clothes dryers, and outdoor grills need not be so equipped.

Codification Notes: “AGA” means American Gas Association.