509.4 Type of Venting System to be Used

The type of venting system to be used shall be in accordance with Table 509.4. [NFPA 54:12.5.1]

509.4.1 Plastic Piping. Where plastic piping is used to vent an appliance, the appliance shall be listed for use with such venting materials and the appliance manufac

turer’s installation instructions shall identify the specific plastic piping material. The plastic pipe venting materials shall be labeled in accordance with the product standards specified by the appliance manufacturer or shall be listed and labeled in accordance with UL 1738. [NFPA 54:12.5.2]

TABLE 509.4

TYPE OF VENTING SYSTEM TO BE USED {NFPA 54: TABLE 12.5.1}

APPLIANCES	TYPE OF VENTING SYSTEM	LOCATION OF REQUIREMENTS
Listed Category I appliances Listed appliances equipped with draft hood Appliances listed for use with Type B gas vent	Type B gas vent	Section 509.6
Listed Category I appliances Listed appliances equipped with draft hood Appliances listed for use with Type B gas vent	Chimney	Section 509.5
Listed Category I appliances Listed appliances equipped with draft hood Appliances listed for use with Type B gas vent	Single-wall metal pipe	Section 509.7
Listed Category I appliances Listed appliances equipped with draft hood Appliances listed for use with Type B gas vent	Listed chimney lin- ing system for gas venting	Section 509.5.3
Listed Category I appliances Listed appliances equipped with draft hood Appliances listed for use with Type B gas vent	Special gas vent listed for these appliances	Section 509.4.3
Listed vented wall fur- naces	Type B-W gas vent	Section 509.6
Category II, Category III, and Category IV appliances	As specified or furnished by manufacturers of listed appliances	Section 509.4.1 and Section 509.4.3
Appliances that can be converted to use solid fuel Unlisted combination gas- and oil-burning appliances Combination gas- and solid fuel-burning appliances Appliances listed for use with chimneys only Unlisted appliances	Chimney	Section 509.5
Listed combination gas- and oil-burning appliances	Type L vent	Section 509.6
Listed combination gas- and oil-burning appliances	Chimney	Section 509.5
Decorative appliance in vented fireplace	Chimney	UMC Section 911.2
Gas-fired toilets	Single-wall metal pipe	Section 509.7
Direct-vent appliances	—	Section 509.2.6
Appliances with integral vents	—	Section 509.2.7

509.4.2 Plastic Vent Joints. Plastic pipe and fittings used to vent appliances shall be installed in accordance with the appliance manufacturer’s installation instructions. Plastic pipe venting materials listed and labeled in accordance with UL 1738 shall be installed in accor dance with the vent manufacturer’s installation instruc

tions. Where primer is required, it shall be of a contrasting color. [NFPA 54:12.5.3] 509.4.3 Special Gas Vents. Special gas vents shall be listed and labeled in accordance with UL 1738 and installed in accordance with the special gas vent manufacturer’s installation instructions. [NFPA 54:12.5.4]