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Chimney Liners

Relining a masonry chimney is one of the most common steps before connecting a new wood stove, fitting a pellet appliance into an existing fireplace opening, or bringing an aging flue up to current code requirements. A flexible stainless steel chimney liner drops through the existing chimney structure without demolishing the masonry, and selecting the correct diameter and length determines how safely and efficiently the appliance vents.

A chimney liner, also called a chimney flue liner, is the inner sleeve that carries combustion gases from the appliance up through the chimney to the exterior. It protects surrounding masonry from heat and corrosive flue gases and is a required component in most wood stove and fireplace insert installations under current building codes. Fire Pit Surplus carries stainless steel chimney liners in 5-inch and 6-inch diameters for wood stoves, pellet stoves, and fireplace inserts.

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Why Choose Chimney Liners

  • All Necessary Components Included: Each kit ships with the flexible liner, top plate assembly, connector hardware, and installation components in one order, eliminating the need to source individual pieces separately. For a complete system with a dedicated rain cap, collar, and all termination hardware pre-matched, the venting kit collection carries those bundled options.
  • Flexible Construction for Offset Chimneys: A flexible stainless steel chimney liner installs through bends, offsets, and irregular flue paths that rigid chimney pipe cannot navigate, which covers the most common condition in older masonry chimneys.
  • Correct Fit for Appliance Outlet Diameter: Chimney liner diameter must match the appliance outlet exactly. Most wood stove inserts require a 6-inch liner; most freestanding wood stoves and pellet stoves require a 5-inch liner. A mismatched liner creates draft problems, creosote buildup, and code violations.
  • Chimney Reline Without Masonry Work: Relining replaces a damaged, undersized, or unlined flue without tearing out brickwork. A flexible liner kit handles the most common reline scenario: an existing masonry chimney that needs a code-compliant interior sleeve to match a new or upgraded appliance.

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Top Stainless Steel Flue Liners for Sale

Best Fireplace Insert Chimney Liner

5"Ø X 35' Stainless Flex Liner Kit for Inserts VOLKI-535

VOLKI-535 5 inch 35 foot stainless flex chimney liner kit for fireplace inserts

The VOLKI-535 is the right choice for wood-burning fireplace insert installations in chimneys up to 35 feet, covering two-story homes and taller masonry structures where a standard 25-foot kit falls short. The insert connector hardware included in the kit attaches directly at the front collar position of the insert.

  • 5-inch diameter Γ— 35-foot length; corrugated stainless steel
  • Complete kit with liner, top plate, and installation hardware
  • Rated for wood-burning and gas fireplace insert applications

Best Flexible Liner for Wood Burning Stoves

5"Ø X 25' Stainless Flex Liner Kit VOLKA-525

VOLKA-525 5 inch 25 foot stainless steel flexible chimney liner stove kit

The VOLKA-525 covers the most common reline scenario: connecting a new wood stove or pellet stove to an existing masonry chimney where the flue is unlined or undersized. It ships complete with all connection fittings, so the installation does not require sourcing hardware separately.

  • 5-inch diameter Γ— 25-foot length; high-temperature rated flexible stainless steel
  • Compatible with wood stoves, pellet stoves, and solid fuel appliances with 5-inch outlets
  • Curbside freight delivery

Best 316Ti Stainless Steel Chimney Liner

Olympia Forever Flex Chimney Liner Kit 6"

Olympia Forever Flex 6 inch 316Ti stainless steel chimney liner kit

The Olympia Forever Flex is the right pick when long-term corrosion resistance and a verifiable UL listing are both required. It suits high-moisture, high-creosote installations and any jurisdiction that requires documentation at final inspection.

  • 6-inch diameter Γ— 25 or 35 feet; 316Ti stainless steel; UL 1777 listed
  • Complete kit: liner, top plate, cap, connector, and all installation hardware
  • Available in tee kit or insert connector format; suits wood stoves and coal appliances with 6-inch outlets

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What to Look for in a Chimney Flue Liner

Diameter and Appliance Match

  • Match liner to appliance outlet: A chimney liner for a wood burning stove must match the stove's flue collar diameter exactly. Most freestanding wood stoves and pellet stoves use a 5-inch or 6-inch outlet; most fireplace inserts use a 6-inch outlet. Verify the spec before ordering; undersizing restricts draft and oversizing increases condensation.
  • Transition fittings matter: The liner must connect to the appliance collar without gaps, and the connection hardware in the kit determines whether a transition fitting is required. Tee kits include a tee for stoves with a rear exit; insert connector kits use a straight flex-to-collar adapter for front-exit inserts.
  • 6-inch liners for fireplaces: A fireplace liner sized for an open fireplace or insert installation typically needs a 6-inch interior diameter. The Olympia 316Ti kit and the VOLKI insert-series kits are built specifically for these larger-outlet scenarios.

Length and Chimney Height

  • Measure chimney height first: A 25-foot kit covers most single-story and two-story chimneys up to 20 to 25 feet from appliance to termination. Taller chimneys require a 35-foot kit. Ordering short means the liner will not reach the termination cap and the installation fails.
  • Flexible vs. rigid for your run: A flexible chimney liner navigates offsets of up to 30 degrees without additional components, covering most real-world masonry chimneys. Chimneys with sharper offsets or multiple bends may require a chimney-specific assessment before specifying liner length.
  • 6-inch chimney liner kits in 35-foot runs: The Olympia kit in the 35-foot configuration suits both taller chimneys and installations where extra liner is preferable to a tight cut at the top plate.

Material Grade and Certifications

  • 316L vs. 316Ti stainless steel: Both are acid-resistant alloys appropriate for chimney relining. 316Ti (used in the Olympia Forever Flex) adds titanium stabilization for wood and coal applications, where acidic condensate is most aggressive. For standard wood burning stove chimney liner applications, either grade is acceptable; for high-moisture or high-creosote scenarios, 316Ti is the stronger long-term choice.
  • UL listed chimney liner: A UL 1777 listing confirms the liner has been tested to the standard for factory-built chimney systems used for relining. Local building departments often require documentation of UL listing at final inspection. Confirm local requirements before ordering.
  • NFPA 211 compliance: Most jurisdictions require chimney liner installations to conform to NFPA 211, the standard covering chimneys, fireplaces, vents, and solid fuel appliances. A UL-listed liner from a recognized manufacturer satisfies this requirement in most cases; confirm with the local authority having jurisdiction for your installation.

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Types of Stainless Steel Chimney Liners

Drolet VOLKA-425 5 inch freestanding stove chimney liner kit

Freestanding stove liner kits (5-inch)

Serve the most common relining scenario: fitting a chimney for a new or upgraded freestanding wood stove or pellet stove with a 5-inch flue collar. The liner drops through the masonry flue and connects directly to the appliance collar at the bottom, with the top plate sealing the flue at the roofline.

Drolet VOLKA-425

Drolet VOLKI-625 6 inch fireplace insert chimney liner kit

Fireplace insert liner kits (6-inch)

Address the insert installation scenario, where a wood-burning insert slides into an existing masonry fireplace opening and its exhaust collar needs a dedicated liner to reach the chimney termination. These kits use an insert connector to attach at the appliance and run the full height to the cap above the roofline.

Drolet VOLKI-625

Drolet VOLKA-635 6 inch 35 foot extended-length chimney liner kit

Extended-length liner kits (35-foot)

Exist for taller chimneys in two-story and higher structures. The same 5-inch or 6-inch liner in a longer run covers installations that a standard 25-foot kit undershoots. Both diameter options are available in the 35-foot configuration.

Drolet VOLKA-635

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Why Buy from Fire Pit Surplus

  • Price Match Guarantee: We match competitor prices on identical products. Find the same chimney liner for less and we'll match it.
  • Fast and Free Shipping: Every order ships free with secure, insured delivery.
  • Expert Support: Real people who know these products answer your questions before purchase, during delivery, and after installation.
  • Authorized Dealer: We carry every brand as an authorized retailer, which means genuine products and full manufacturer warranties on every order.
  • Flexible Financing: Pay over time with financing options that make the right setup accessible.

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Frequently Asked Questions

What is the difference between a chimney liner and a chimney liner kit?

A chimney liner is the flexible stainless steel tube itself. A chimney liner kit includes the liner plus the top plate, connector hardware, and termination components needed for a complete installation. The kits on this page include all necessary hardware; loose liner-only material is not sold separately here.

How much does a chimney liner cost?

Chimney liner material typically runs $400 to $700 for a standard flexible stainless steel kit. Chimney liner installation price, paid to a licensed chimney contractor, typically adds $300 to $800 depending on chimney height, access, and local labor rates. A full chimney relining project combining material and labor generally falls in the $700 to $1,500 range for straightforward residential installations.

Do I need a stainless steel or flexible chimney liner?

Flexible stainless steel chimney liners work in nearly all residential masonry chimney relines, including chimneys with bends and offsets. An insulated chimney liner adds a ceramic wrap around the flex liner to improve draft and reduce condensation, worth specifying in colder climates or older masonry structures. For most standard appliance installations, a non-insulated flexible liner is sufficient; insulation becomes relevant when slow draft or excess creosote buildup is persistent.

Can I use a chimney liner for a fireplace insert?

Yes. A 6-inch flexible fireplace insert chimney liner connects to the insert's collar and runs from the insert through the existing masonry flue to the chimney cap. Use an insert connector kit, not a tee kit. Insert connectors attach at the front collar position, while tee kits are for stoves with rear or bottom exits.

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Shop Chimney Liner Kits at Fire Pit Surplus

Finding the right chimney liner comes down to three specs: the appliance outlet diameter, the chimney height, and the fuel type driving the material grade choice. Fire Pit Surplus carries stainless steel and 316Ti chimney liner kits as an authorized dealer with free insured shipping on every order. If the installation requires a complete termination system with rain cap and collar pre-matched, the venting kit collection has those bundled options.

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