6" x 35' Aluminum Liner Kit

Details

Model: 2GACKIT0635
Manufacturer: Z-Flex
Series: Z-Flex Aluminum Gas Venting System
Part Number: 72972
Description: Aluminum Chimney Liner Kit, 6 in. Diameter x 35 ft. Length, for Category I Natural Draft Gas Appliances.

Product Overview

The Z-Flex 2GACKIT0635 Aluminum Gas Liner Kit is a UL-listed flexible venting system engineered for Category I natural draft gas-fired heating equipment and gas fireplaces. The 6-inch diameter, 35-foot aluminum liner is designed to provide a corrosion-resistant, airtight flue for efficient exhaust of combustion gases. Constructed from high-grade aluminum alloy, the liner accommodates retrofit installations through existing chimney structures, offering flexibility in routing while maintaining code-compliant performance. The system supports negative pressure venting applications and is approved for use where condensation and corrosive byproducts are not present.

Technical Specifications

• Manufacturer Part Number: 2GACKIT0635
• Alternate Part Number: 72972
• System Type: Flexible Aluminum Chimney Liner Kit
• Diameter: 6 inches (nominal)
• Length: 35 feet
• Material: Corrugated aluminum alloy
• Listing/Certification: UL Listed for Category I gas venting applications
• Application: Natural draft gas-fired furnaces, boilers, water heaters, and fireplaces
• Category Compatibility: Category I only (non-condensing, negative pressure systems)
• 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 only
• Temperature Rating: Standard flue gas temperatures for atmospheric gas appliances
• Included Components: 35 ft aluminum liner, top termination, appliance connector, fasteners, and support materials
• Installation Type: Flexible liner for retrofit through existing chimneys or vent shafts
• Standards Compliance: Meets NFPA 54 (National Fuel Gas Code) and ANSI Z223.1 requirements
• Environment: Indoor venting systems using natural draft operation

Installation Notes

• Install only with Category I natural draft appliances as defined by NFPA 54.
• Inspect and clean the existing chimney prior to liner installation.
• Ensure liner routing maintains continuous upward slope for draft performance.
• Do not use where condensation or corrosive acids may form in the flue.
• Secure all terminations and joints in accordance with Z-Flex installation guidelines.
• Verify system integrity and draft stability following installation.

Summary

The Z-Flex 2GACKIT0635 Aluminum Gas Liner Kit is a UL-listed, 6-inch by 35-foot flexible venting assembly designed for Category I natural draft gas appliances. Built from corrosion-resistant aluminum, the kit provides reliable flue gas containment and draft performance for retrofit and new chimney applications, ensuring code-compliant operation in professional mechanical and HVAC system installations.