Olympia Forever Flex Features
- Tee Kit or Insert Connector: Tee kits have a tee at the base for a stove connecting through a wall thimble. Insert connector kits run straight up from the top of an insert. Both in 25 and 35 foot lengths.
- 316Ti Stainless Steel: 316Ti is the alloy specified for wood and coal because it stands up to the acidic condensate those fuels produce. Cheaper 304 liners corrode faster on a wood appliance.
- Fully Flexible for Offset Chimneys: The corrugated construction bends around offsets and bends that rigid pipe simply cannot pass, which is why relining an older masonry chimney is almost always done with flex.
- Complete Kit, Not Just Liner: Ships as a kit rather than a bare coil, so the connector, top plate, cap and hardware arrive together and you are not chasing parts mid-job.
- Right-Sizes an Oversized Flue: Most masonry flues are far larger than a modern stove needs, which cools the smoke and kills the draft. Dropping in a correctly sized liner typically produces faster starts, stronger draft and less creosote.
Forever Flex Liner Specifications
| Available Lengths | 25', 35' |
| Kit Types | Tee kit, insert connector kit |
| Part Numbers | K6T625-S, K6T635-S, K6A625-S, K5A635-S |
| Diameter | 6" |
| Material | 316Ti stainless steel |
| Listing | UL 1777 relining liner |
| Application | Masonry chimney relining |
| Flexibility | Fully flexible, navigates offsets |
Forever Flex Liner Installation Manual
Download the full manufacturer installation instructions before you begin. Installation must follow these instructions and your appliance manual to stay code compliant and keep the warranty valid.
Olympia Forever Flex Liner Installation and Maintenance Instructions (PDF)
Olympia Chimney Liner FAQ
Tee kit or insert connector, which do I need?
Tee kit if the stove connects into the chimney through a wall thimble, since the tee gives you a clean-out at the base. Insert connector if the appliance connects straight up from its top, which is the usual insert setup.
How do I know if I need 25 or 35 feet?
Measure the flue from the top of the chimney down to where the appliance connects, then add a couple of feet of slack. Ordering short is the expensive mistake here.
Do I need to insulate the liner?
In most cases yes, and many jurisdictions require it. Insulation keeps flue gases hot, improves draft, cuts creosote, and is often needed to hold listed clearances in an exterior chimney.
What size liner do I need?
Match the liner to your appliance outlet. A 6" stove or insert takes a 6" liner. Going undersized chokes the draft and going oversized cools the flue gases and builds creosote faster.
What is the difference between the tee kit and the appliance connector kit?
The tee kit has a tee at the base, used when the stove connects through a wall thimble into the chimney. The appliance connector kit connects straight up from the top of an insert or stove with no tee.
Do I need insulation around the liner?
In most cases yes, and many codes require it. Insulation keeps the flue gases hot, improves draft, reduces creosote, and is often required to maintain listed clearances in an exterior chimney.
Will a flexible liner fit an offset chimney?
That is exactly what it is for. The corrugated 316Ti construction bends around offsets that rigid pipe cannot navigate, which is why relining is usually done with flex.