FireFlex 316L Stainless Steel Flexible Chimney Liner - Basic Kit

Upgrade your chimney system with the FireFlex 316L Basic Flexible Chimney Liner Kit. Designed for relining existing masonry chimneys, this complete chimney liner kit provides a safe, durable pathway for venting exhaust gases from wood, pellet, oil, and gas-burning appliances. Manufactured from heavy-duty 316L stainless steel, FireFlex liners offer outstanding corrosion resistance, exceptional flexibility, and dependable long-term performance in demanding heating applications.

Whether you're relining a deteriorated clay tile flue, installing a new fireplace insert, or connecting a wood stove, pellet stove, furnace, boiler, or gas appliance, the FireFlex 316L flexible chimney liner is engineered to simplify installation while providing reliable venting performance.

FireFlex 316L Flexible Chimney Liner Kit Features

• Premium 316L Stainless Steel
  Heavy-duty 316L stainless steel provides outstanding corrosion resistance and long-term durability in wood, oil, pellet, and gas venting applications.
• Flexible Construction
  The highly flexible liner easily navigates offsets and bends commonly found inside existing masonry chimneys.
• UL 1777 Listed
  Tested and listed to UL 1777 standards for chimney liner safety and performance.
• Complete Chimney Liner Kit
  Includes the flexible chimney liner, top plate, rain cap, and appliance connector for a complete installation.
• Multiple Fuel Compatibility
  Compatible with wood, pellet, oil, and gas appliances.
• Lifetime Warranty
  Backed by a lifetime warranty for long-term confidence.

Why Install a Stainless Steel Chimney Liner?

A stainless steel chimney liner protects the interior of an existing masonry chimney while safely venting combustion gases from your heating appliance. Older clay tile liners can crack, deteriorate, or become damaged over time, allowing heat and corrosive flue gases to reach surrounding masonry.

Relining a masonry chimney with a UL 1777 listed stainless steel liner can improve draft, enhance appliance performance, reduce creosote accumulation, and help protect the chimney from continued deterioration.

Why Choose 316L Stainless Steel?

316L stainless steel offers greater corrosion resistance than standard stainless steel in demanding chimney environments. It performs exceptionally well with wood-burning fireplaces, wood stoves, pellet appliances, oil-fired equipment, and many gas appliances where moisture and acidic condensates may be present.

Its excellent flexibility also allows installers to navigate offsets and bends that would be difficult or impossible with rigid chimney liners.

316L vs 304 Stainless Steel

Common Applications

• Wood stove installations
• Fireplace inserts
• Pellet stove venting
• Oil furnace venting
• Oil boiler venting
• Gas appliance venting
• Existing masonry chimney relining
• Damaged clay tile liner replacement

Product Specifications

What's Included?

• 316L Flexible Chimney Liner
• Top Plate
• Rain Cap
• Appliance Connector

Installation Overview

The flexible liner is designed to be installed inside an existing masonry chimney. Its flexibility allows it to pass through offsets and bends more easily than rigid chimney liners. Once positioned, the liner connects to the appliance below and terminates at the chimney top using the included top plate and rain cap.

Proper liner sizing, insulation requirements, and installation procedures should always follow appliance manufacturer instructions and local building codes.

Why UL 1777 Matters

UL 1777 is the recognized safety standard for chimney liners installed in existing masonry chimneys. A UL 1777 listed liner has been tested for high-temperature performance and installation requirements, giving installers and homeowners confidence that the chimney liner has been evaluated to recognized industry standards.

FireFlex 316L Chimney Liner FAQs

Why choose 316L instead of 304?

316L stainless steel provides greater corrosion resistance, particularly in oil-burning applications and environments where acidic condensates are present.

Can this liner be used with wood-burning appliances?

Yes. FireFlex 316L liners are suitable for wood-burning fireplaces, fireplace inserts, and wood stoves.

Can it be used with pellet appliances?

Yes. The liner is compatible with pellet-burning appliances when installed according to appliance manufacturer requirements.

Can it be used with oil appliances?

Yes. 316L stainless steel is commonly selected for oil-burning applications because of its excellent corrosion resistance.

Can it navigate chimney offsets?

Yes. The flexible construction allows the liner to pass through bends and offsets commonly found in existing masonry chimneys.

What comes in the kit?

Each kit includes the flexible chimney liner, top plate, rain cap, and appliance connector.

Does it meet UL standards?

Yes. FireFlex 316L chimney liners are UL 1777 listed.

How long will a 316L chimney liner last?

When properly installed, maintained, and used according to appliance requirements, 316L stainless steel chimney liners provide long-term performance and are backed by a lifetime warranty.

Why Choose FireFlex?

• Premium 316L stainless steel
• UL 1777 Listed
• Flexible for offsets and bends
• Complete installation kit
• Lifetime Warranty
• Compatible with wood, pellet, oil, and gas appliances