Hart Cooley 4ADFC4 Flexible B-vent Pipe 4x48 in

Product Description

The HART COOLEY 4ADFC4 is a flexible B-vent pipe section used to vent natural gas and propane appliances that produce Category I flue gases. Measuring 4 inches in diameter and 48 inches in length, this vent pipe connects gas furnaces, boilers, and water heaters to a B-vent flue system. Its flexible construction allows routing around obstructions or through tight spaces where rigid vent sections are not practical. Licensed HVAC technicians and plumbers install this type of fitting during new construction and service replacement work.

This flexible B-vent section is suited for residential and light commercial applications where a listed double-wall vent connector is required. Typical installations include gas furnace flue connections, atmospheric water heater venting, and boiler vent runs. It is used where the vent path must change direction or navigate framing, joists, or other structural elements that prevent the use of straight rigid pipe sections.

Key Features

• Flexible design allows routing around structural obstructions without additional elbows
• 4-inch diameter fits standard B-vent connector fittings and collars
• 48-inch length provides a full 4-foot run in a single section
• Double-wall B-vent construction maintains flue gas temperature and reduces condensation risk
• Designed for Category I appliances burning natural gas or propane

Compatibility

Designed as an OEM-style replacement and new-installation flexible vent connector for residential and light commercial B-vent flue systems serving Category I gas appliances with a 4-inch vent collar.

Installation Notes

Installation of B-vent pipe must comply with NFPA 54 (National Fuel Gas Code) and the appliance manufacturer's venting instructions. Shut off the gas supply and allow the appliance to cool completely before disconnecting or replacing any vent section. Secure all joints according to the vent system manufacturer's guidelines and verify that the completed vent system has the proper rise and clearance to combustibles. This work is typically performed by a licensed HVAC technician or plumber.

Technical Specifications

• Diameter: 4 inches
• Length: 48 inches
• Vent Type: Type B Flexible
• Application: Category I gas appliance venting

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 4ADFC4