scope:

This Standard applies to connectors for outdoor use consisting of flexible tubing depending on all-metal construction for gas tightness and having a fitting at each end provided with tapered pipe threads for connecting manufactured home¹ gas piping to a manufactured home lot gas outlet or a crossover in multiple unit manufactured homes as permitted in the Federal Standards.

This Standard covers connectors having a maximum rated capacity of two hundred and fifty thousand (250,000) BTU/hr. except that listed gas connectors, complying with ANSI² Z21.24 (latest edition), Metal Connectors for Gas Appliances, may be certified under this Standard provided they also meet the requirements for a minimum rated capacity of one hundred thousand (100,000) BTU/hr.