Insulated Chimney Liner - 304L or 316L Hybrid Smoothwall Flexible Stove Pipe Kit - Includes Connection, Top Plate, Collar, Support, & Cap

Pre-Insulated Stainless Chimney Liners Designed With Smooth Walls For Less Creosote Buildup

Insulated Chimney Liner - 304L or 316L Hybrid Smoothwall Flexible Stove Pipe Kit - Includes Connection, Top Plate, Collar, Support, & Cap Forever Flex Hybrid insulated stainless chimney liner Forever Flex stainless chimney liner tee Forever Flex stainless chimney liner appliance connector Forever Flex stainless chimney liner top plate Forever Flex stainless chimney liner cap
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Brand: Forever Flex
Item # 23269
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Availability: Available
Starting At: $603.00
Price in Rewards Points: 60300

* Select a Stainless Steel Grade:

* Select a Liner Connection Type:

* Select a Liner Diameter (Inches):

* Select a Liner Length (Feet):

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Our Forever Flex Hybrid smooth wall chimney liners are the safest and easiest way to install a flexible stove pipe into an existing chimney. Smooth wall construction means that the inside of these flexible stove pipes offer more draft with less creosote buildup. These Hybrid liners are durable, featuring high quality 304L or 316L stainless steel construction and components, with craftsmanship guaranteed for life when burning the correct fuel. Because these liners are pre-insulated, they can also provide zero/zero clearance inside a masonry chimney. This means that there is no longer a need to fuss with traditional fiberglass wraps or pouring dusty bags into a chimney. Available in 304L or 316L stainless with 5", 5.5", 6", 7", or 8" diameters in 20, 25, 30, or 35 foot lengths with your choice of tee or appliance connector. Custom lengths may be available, contact us at 888-986-1535 or email [email protected] for more information.

Please note: These chimney liners and stove pipe kits are made with your choice of either 304L or 316L stainless steel. When choosing a type of stainless liner, be aware that 304L is to be used with wood and pellet fuel stoves only. 304L is a lower grade of stainless steel and therefore is not recommended for gas, oil, or coal fuels. Burning these types of fuels in a 304L stainless liner will not only void the Forever Warranty, it may create a dangerous situation in your home due to the potential C/O leaks and fire hazards. If you are burning gas, oil, or coal, or would just like a higher quality stainless, please choose a 316L chimney liner.

Liner Kit Includes:

  • 304L or 316L stainless flexible chimney liner
  • Pre-insulated with smooth walls
  • Stainless tee or appliance connector
  • Stainless cap with screen and wind guard
  • Stainless top plate - 13" x 13" no-sag/no-leak
  • Stainless storm collar
  • Stainless support clamp
  • Forever Warranty when burning correct fuel(s)
  • Last couple inches of liner are not insulated
  • Insulation is 1 inch thick. This means the outer diameter of the liner is 2 inches larger than the interior.

Not All Chimney Liners Are Created Equal - Money should not be the deciding factor when you purchase a new liner. We offer peace of more....

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Application Wood, pellet, or gas burning Fireplaces.
Wood, pellet, gas, oil, or coal burning stoves/inserts.
Gas, oil, or coal burning furnaces/boilers.
Other wood or pellet burning appliances.
Other gas HVAC appliances (not for use with high-efficiency or condensing units). Not for use when burning corn
Material 304L Stainless for wood & pellet.
316L Stainless for wood, pellet, gas, oil, coal.
Type Forever Flex Hybrid smooth wall pre-insulated
Diameter 5 inch inner (7 inch outer)
5 1/2 inch inner (7 1/2 inch outer)
6 inch inner (8 inch outer)
7 inch inner (9 inch outer)
8 inch inner (10 inch outer)
Length 20 feet
25 feet
30 feet
35 feet
Product Warranty


The warranty that works with your home! Beyond just your lifetime, it covers 316L, 304L, 316Ti, and AL29-4C Stainless Steel Liner/Relining pipe and components for wood, coal, pellet, oil, or category 1 gas appliances.


Our manufacturer warrants to you (the €œpurchaser€) that for the period set forth below, the FOREVER FLEX™, ARMOR FLEX™, or RHINO RIGID™ stainless steel relining pipe and components when used as a chimney relining pipe, in a masonry chimney, exclusively for residential appliances, shall be free from defects in material or manufacturer€™s workmanship; and from perforation caused by chimney fire or over firing by you (the €œpurchaser€).

The benefits of this warranty shall apply to you (the €œpurchaser€) FOREVER with no time limit, provided that you continue to own your own home where the FOREVER FLEX™, ARMOR FLEX™, or RHINO RIGID™ is installed. In all events, even if you sell your home, our manufacturer will honor the warranty FOREVER with no time limit so that even a new owner will benefit from the installation in your home.

Conditions & Limitations

Installation of the pipe and components must be in accordance with the manufacturer€™s written instructions: 

  1. The product must be used only for the lining or relining of chimney€™s used to vent residential appliances
  2. Use of this pipe for venting gas appliances is limited to Category I appliances
  3. The FOREVER FLEX™, ARMOR FLEX™, or RHINO RIGID™ lining system must be cleaned and inspected on an annual basis by an experienced chimney professional, (i.e., at intervals of no more than 18 months each, commencing from the date of purchase), who must fill out and date the appropriate section on this warranty card upon completion of such yearly maintenance. Receipts verifying the annual maintenance was performed must also be retained
  4. Corrosive chemical chimney cleaners must not be used
  5. Driftwood, wood, or wood pellets containing salt, preservative treated lumber, plastic, experimental fuels, and household trash must not be burned in the appliance
  6. Plastic bristle flue-cleaning brushes are recommended
  7. In the case of a chimney fire, the chimney must be inspected and approved by an experienced and qualified chimney professional, according to maintenance instructions before reuse
  8. The chimney must have a cap or slate covering installed

Processes & Liability

You may make a claim under this warranty by giving notice to your chimney professional and having your chimney professional provide information about the claim to Olympia Chimney Supply. Upon approval of your claim,our manufacturer shall provide new FOREVER FLEX™, ARMOR FLEX™, or RHINO RIGID™ pipe and components to you as your exclusive remedy.

Our manufacturer does not assume any liability or responsibility for faulty installation of the liner or components, or for defective materials not supplied by it.

Neither our manufacturer nor the installer of the FOREVER FLEX™, ARMOR FLEX™, or RHINO RIGID™ lining system shall be liable for any removal or installation charges or for any special, incidental, or consequential damages in any way related to, the FOREVER FLEX™, ARMOR FLEX™, or RHINO RIGID™ pipe.

This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state. Some states do not allow the exclusion or limitations of incidental or consequential damages, so the above limitations or exclusions may not apply to you.


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* Last updated on October 26th 2016.
* Product, parts, color, finish, or texture may vary slightly from photos.
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