Overview
The Forever Flex 6" Pre-Insulated Tee Kit is a complete stainless steel chimney liner system for relining a masonry chimney. It's made from 316Ti or 316L stainless steel, the alloy rated for wood, oil and gas, so one liner covers wood stoves, fireplace inserts, oil furnaces, gas furnaces and water heaters. Buy it from StoveSource and pay no sales tax in any state.
Use it where the stove or appliance connects through the side of the chimney (thimble). The tee sits at the bottom of the liner and the tee cap closes off the bottom for cleaning.
Available in 20, 25, 30 ft lengths. Measure from the top of the chimney crown down to the appliance connection, then add about a foot for trimming.
What's in the kit
- Forever Flex 6" pre-insulated stainless flexible liner (316Ti or 316L), pre-cut to the length you choose
- 6" rain cap with screen and wind guard (CSLF6)
- 6" No-Sag 13" x 13" top plate (TPNS6-1313)
- 6" tee with 10" take-off (TLF6)
- Tee cap (TC6)
Specifications
- Diameter: 6" (inside)
- Material: 316Ti or 316L stainless steel
- Fuel: wood, coal, oil, gas
- Listing: UL 1777
- Manufacturer: Forever Flex (Olympia Chimney Supply)
Sizing tip
Match the liner diameter to your stove or appliance flue collar, and never go smaller than the collar.
The liner comes pre-insulated from the factory, so there's no separate insulation wrap to install. That makes it the fastest route to an insulated wood stove liner, which many codes and stove manuals require.
Parts for your liner install
- Top of the chimney: rain cap, Deluxe Top cap and plate, top plates (No-Sag 13x13, No-Sag 13x18 and 18x18, flat, terracotta 8x8 or larger), storm collar and support clamp
- At the appliance: tee and tee cap, appliance connector, quick connector, elbows, offset box and reducers
- Installing it: pulling nose cone, insulation (FlexWrap blanket or Super Wrap kit), liner coupling and mortar collar
See every fitting in chimney liner parts and fittings.
Why buy from StoveSource: Authorized dealer · No Sales Tax · Free shipping over $250 · 1-888-914-0022
Shipping & Returns
Free shipping on orders over $250 · ships in 1–3 business days.
Free shipping on orders over $250 to the continental US; a flat $22.95 shipping fee applies to orders under $250. Accessories and parts ship by parcel carrier (UPS, FedEx, or USPS), typically in 1–3 business days.
Returns. Unused, uninstalled items in original packaging can be returned within 30 days, subject to a 15% restocking fee.
Sold by StoveSource (authorized dealer). Ships directly from the brand's authorized distributor warehouse — see our Authorized Dealer page.