Selkirk 1740035 Flex Chimney Liner Kit 4 in X 35 Ft

Product Description

The SELKIRK 1740035 is an aluminum flexible chimney liner kit designed to contain and direct flue gases safely through an existing masonry or factory-built chimney. Flexible liner systems are used when a rigid liner cannot be installed due to offsets or existing chimney geometry. This kit measures 4 inches in diameter and 35 feet in length. The aluminum construction handles the condensate and acidic byproducts that form when vent gases interact with moisture inside the flue. By reducing the effective diameter of the chimney, the liner also improves draft and helps prevent moisture accumulation on interior chimney walls. Licensed chimney sweeps and HVAC technicians are the primary installers.

This liner kit is suited for residential applications where an existing chimney flue requires relining. Common scenarios include retrofitting an older masonry chimney to serve a new appliance, correcting oversized flue conditions, or restoring a deteriorated liner. The 4-inch diameter is typical for smaller gas appliances, inserts, or fireplace applications where a compact flue is required. The flexible construction allows routing through chimneys with slight offsets that would prevent rigid sections from passing through.

Key Features

• 4-inch diameter reduces oversized flue openings to improve draft efficiency
• 35-foot length accommodates standard residential chimney heights
• Aluminum construction resists corrosion from acidic flue gas condensate
• Flexible design routes through chimneys with offsets or irregular geometry
• Contains vent gases to protect surrounding masonry from moisture damage

Compatibility

Designed as an OEM-style replacement flexible liner for residential chimney relining applications requiring a 4-inch diameter aluminum liner.

Installation Notes

Installation should be performed by a qualified chimney sweep or licensed HVAC technician in accordance with local building codes and NFPA 211. Ensure the appliance and any connected venting is fully shut down and cooled before beginning liner work. The liner must be properly terminated at both the top and bottom with listed components appropriate for the appliance type. Do not use aluminum flexible liner on appliances or applications requiring stainless steel or high-temperature-rated liner materials.

Technical Specifications

• Diameter: 4 inches
• Length: 35 feet
• Material: Aluminum
• Country of Origin: China

Standard Information

• Brand: SELKIRK
• Manufacturer Part Number: 1740035