PURPOSE: This rule regulates the installation of liquefied petroleum gas appliances and liquefied petroleum gas piping.

PUBLISHER’S NOTE: The secretary of state has determined that publication of the entire text of the material that is incorporated by reference as a portion of this rule would be unduly cumbersome or expensive. This material as incorporated by reference in this rule shall be maintained by the agency at its headquarters and shall be made available to the public for inspection and copying at no more than the actual cost of reproduction. This note applies only to the reference material. The entire text of the rule is printed here.

1. (1) Standards contained in National Fire Protection Association (NFPA) Manual No. 54, National Fuel Gas Code, 2024 edition, published by the National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269-9101, are incorporated by reference. This rule does not incorporate any subsequent amendments or additions to the referenced material. The balance of this rule sets forth requirements for liquefied petroleum gas (LP gas) applications not covered in the manual. The scope of National Fire Protection Association (NFPA) Manual No. 54, National Fuel Gas Code, 2024 edition, is to develop fire safety codes, standards, recommended practices, and manuals, as may be considered desirable, covering the installation of piping and appliances using fuel gases such as natural gas, manufactured gas, liquefied petroleum gas, and liquefied petroleum gas-air mixture.
2. (2) The repair or welding of LP gas appliance heat exchangers is strictly prohibited.
3. (3) All equipment covered by this standard shall be installed and maintained in compliance with the instructions provided by the manufacturer. Appliances designed to use only a specific fuel may not be converted to use a different fuel if the manufacturer has prohibited such conversions.

AUTHORITY: sections 261.023.6. and 323.020, RSMo 2016.* Original rule filed Jan. 24, 1968, effective Feb. 3, 1968. Amended: Filed Sept. 8, 1969, effective Sept. 18, 1969. Amended: Filed May 13, 1977, effective Jan. 13, 1978. Amended: Filed May 2, 1985, effective Sept. 27, 1985. Amended: Filed March 3, 1989, effective June 29, 1989. Amended: Filed Nov. 13, 1997, effective June 30, 1998. Amended: Filed Dec. 3, 2001, effective June 30, 2002. Amended: Filed Oct. 15, 2008, effective March 30, 2009. Amended: Filed June 13, 2011, effective Jan. 30, 2012. Amended: Filed June 26, 2012, effective Jan. 30, 2013. Amended: Filed June 16, 2014, effective Jan. 30, 2015. Amended: Filed July 1, 2016, effective Feb. 28, 2017. Amended: Filed Feb. 14, 2020, effective Aug. 30, 2020. Amended: Filed Aug. 18, 2022, effective March 30, 2023. Amended: Filed May 15, 2024, effective Dec. 30, 2024. *Original authority: 261.023, RSMo 1973, amended 2013, and 323.020, RSMo 1947, amended 1994, 1998, 2005, 2007.