Selkirk 3" to 8" Aluminum Kit (Flexi-Liner)

Size: 3"x15'

Estimated Arrival: Between and . (To All Contiguous States)

✔ Same-Day Order Processing
✔ Free Returns
✔ No Restocking Fees
✔ Financing Options Available

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Selkirk 3" to 8" Aluminum Kit

Install the Flexi-Liner when re-lining a masonry chimney for Gas applications.

Includes Flexi-Liner Length, Round Top, Flashing with 3" Collar, Mortar Guard, Fasteners, and Instructions.

Slim-Line "Suitcase" style cartons.

Aluminum Flexible Liner

Flexi-Liner system is designed for relining existing masonry or listed factory-built chimneys and vents serving Category I for natural gas or propane fired appliances.

3" to 8" Diameters:

  • 3000 series aluminum, 2 ply
  • Maximum flue gas temperature 470°F
  • 3" - 8" diameter kits available in 25' and 35' lengths
  • 3" - 5" diameter kits available in 15' lengths
  • Extension kits available in 10', 25' and 35' lengths
  • Can be installed on neutral and negative draft gas appliances
  • B-Vent adaptor available to transition from all brands of Type-B gas vent
  • Insulation sleeve promotes quick heat up, enhances draft and allows zero clearance between liner and masonry chimney 
  • Smart Choice warranty on all components


  • Listed to UL 1777 (Flexible Aluminum Liner installed with Insulation Sleeve) in the U.S.A

Product Code
Part No Size
1730015 AF15-03 3"x15' Aluminum Kit
1730025 AF25-03 3"x25' Aluminum Kit
1730035 AF35-03 3"x35' Aluminum Kit
1740015 AF15-04 4"x15' Aluminum Kit
1740025 AF25-04 4"x25' Aluminum Kit
1740035 AF35-04 4"x35' Aluminum Kit
1750015 AF15-05 5"x15' Aluminum Kit
1750025 AF25-05 5"x25' Aluminum Kit
1750035 AF35-05 5"x35' Aluminum Kit
1755025 AF25-05.5 5.5"x25' Aluminum Kit
1755035 AF35-05.5 5.5"x35' Aluminum Kit
1760025 AF25-06 6"x25' Aluminum Kit
1760035 AF35-06 6"x35' Aluminum Kit
1770025 AF25-07 7"x25' Aluminum Kit
1770035 AF35-07 7"x35' Aluminum Kit
1780025 AF25-08 8"x25' Aluminum Kit
1780035 AF35-08 8"x35' Aluminum Kit

CA Residents: 
See Prop 65 WARNING.


Lifetime Limited Warranty

Refer to the Smart Choice Warranty for full warranty details.