Appliances shall be connected to the piping system by one of the following:
- Rigid metallic pipe and fittings.
- Corrugated stainless steel tubing (CSST) where installed in accordance with the manufacturer's instructions.
- Listed and labeled appliance connectors in compliance with ANSI Z21.24 and installed in accordance with the manufacturer's installation instructions and located entirely in the same room as the appliance.
- Listed and labeled quick-disconnect devices used in conjunction with listed and labeled appliance connectors.
- Listed and labeled convenience outlets used in conjunction with listed and labeled appliance connectors.
- Listed and labeled outdoor appliance connectors in compliance with ANSI Z21.75/CSA 6.27 and installed in accordance with the manufacturer's installation instructions.
Connectors and tubing shall be installed so as to be protected against physical damage.
Appliance fuel connectors shall be installed in accordance with the manufacturer's instructions and Sections G24126.96.36.199 through G24188.8.131.52.G24184.108.40.206 (4220.127.116.11) Maximum length.
Connectors shall not exceed 6 feet (1829 mm) in overall length. Measurement shall be made along the centerline of the connector. Only one connector shall be used for each appliance.
Exception: Rigid metallic piping used to connect an appliance to the piping system shall be permitted to have a total length greater than 6 feet (1829 mm) provided that the connecting pipe is sized as part of the piping system in accordance with Section G2413 and the location of the appliance shutoff valve complies with Section G2420.5.G2418.104.22.168 (422.214.171.124) Minimum size.
Connectors shall have the capacity for the total demand of the connected appliance. G24126.96.36.199 (4188.8.131.52) Prohibited locations and penetrations.
Connectors shall not be concealed within, or extended through, walls, floors, partitions, ceilings or appliance housings.
- Connectors constructed of materials allowed for piping systems in accordance with Section G2414 shall be permitted to pass through walls, floors, partitions and ceilings where installed in accordance with Section G2420.5.2 or G2420.5.3.
- Rigid steel pipe connectors shall be permitted to extend through openings in appliance housings.
- Fireplace inserts that are factory equipped with grommets, sleeves or other means of protection in accordance with the listing of the appliance.
- Semirigid tubing and listed connectors shall be permitted to extend through an opening in an appliance housing, cabinet or casing where the tubing or connector is protected against damage.
A shutoff valve not less than the nominal size of the connector shall be installed ahead of the connector in accordance with Section G2420.5.
Internal combustion engines shall not be rigidly connected to the gas supply piping.
Where appliances are equipped with casters or are otherwise subject to periodic movement or relocation for purposes such as routine cleaning and maintenance, such appliances shall be connected to the supply system piping by means of an approved flexible connector designed and labeled for the application. Such flexible connectors shall be installed and protected against physical damage in accordance with the manufacturer's installation instructions.
Suspended low-intensity infrared tube heaters shall be connected to the building piping system with a connector listed for the application complying with ANSI Z21.24/CGA 6.10. The connector shall be installed as specified by the tube heater manufacturer's instructions.