Details
Model: 2GACKIT0535
Manufacturer: Z-Flex
Series: Z-Flex Aluminum Gas Venting System
Part Number: 72970
Description: Aluminum Chimney Liner Kit, 5 in. Diameter x 35 ft. Length, for Category I Natural Draft Gas Appliances.
Product Overview
The Z-Flex 2GACKIT0535 Aluminum Gas Liner Kit is a UL-listed venting assembly designed for use with Category I natural draft gas-fired equipment and gas fireplaces. This kit provides a corrosion-resistant, continuous flue liner constructed from flexible aluminum, ensuring proper venting of combustion byproducts in atmospheric and draft-hood-equipped appliances. The system is engineered to maintain draft integrity while preventing exhaust gas leakage and supporting compliance with NFPA 54 and other applicable fuel gas codes. The 35-foot flexible liner simplifies installation through existing masonry chimneys or vent pathways and includes all required termination and connection components for field assembly.
Technical Specifications
- Manufacturer Part Number: 2GACKIT0535
- Alternate Part Number: 72970
- System Type: Aluminum Chimney Liner Kit
- Diameter: 5 inches (nominal)
- Length: 35 feet
- Material: Corrugated aluminum alloy liner
- Listing/Certification: UL Listed for Category I gas appliance venting
- Application: Natural draft gas-fired heating equipment and gas fireplaces
- Compatibility: Category I appliances only
- Excluded Applications: Not for use with Category II, III, or IV appliances or any system producing condensate or corrosive flue gases
- Operating Pressure: Negative draft (non-positive pressure systems)
- Temperature Rating: Suitable for standard natural draft flue gas temperatures
- Standards Compliance: Meets NFPA 54 (National Fuel Gas Code) requirements for natural draft venting
- Included Components: Flexible aluminum liner, top termination, appliance connector, and fasteners
- Installation Method: Flexible liner for retrofit installation through existing chimney systems
Installation Notes
- Intended for use only with Category I natural draft gas appliances.
- Verify appliance input rating and flue sizing per NFPA 54 before installation.
- Do not install in applications that produce condensation or corrosive exhaust.
- Maintain minimum clearances and secure terminations per Z-Flex installation instructions.
- Inspect all connections for continuity and airtight seal prior to system operation.
Summary
The Z-Flex 2GACKIT0535 Aluminum Gas Liner Kit provides a UL-listed, corrosion-resistant venting solution for Category I natural draft gas-fired appliances. Designed for retrofit or new installations, the flexible 5-inch diameter, 35-foot liner delivers dependable draft performance, simplified field installation, and compliance with national fuel gas standards for professional HVAC and mechanical applications.
