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DuraVent 3" - 5" Wall Thimble Sleeve Extension

Original price $43.11
Original price $43.11 - Original price $85.62
Original price $43.11
Current price $34.49
$34.49 - $77.84
Current price $34.49
+ FREE SHIPPING | Special Order | Ships in 1-7 Business Days | Found it lower?

DuraVent 3" - 5" Wall Thimble Sleeve Extension

The DuraVent Wall Thimble Sleeve Extension is designed to connect your 3" to 5" venting systems. Compatible with DuraTech and DuraPlus chimney systems, this product provides a secure and reliable connection for flue liners. Enjoy maximum durability and a long-lasting product with the DuraVent Wall Thimble Sleeve Extension.

Use to add 6” of length to Wall Pass Through and Wall Thimble for thicker walls.


  • Available Inner Diameter : "3" - "5"
  • Fuel Types Compatible With: Gas
  • UL Listed: Yes
  • Single Wall Construction

Typical Installation(Refer this if required):

Commercial Applications

Commercial projects may require custom parts and unique system designs. DuraVent offers complete project assistance:

  • Engineering Services: Personalized system design services offer comprehensive CAD submittal drawing and complete bills of materials.
  • Custom Parts: If your project requires innovative solutions, contact DuraVent for custom parts that meet your specific project needs.
  • FasNSeal W2: FasNSeal W2 is the ideal choice for commercial applications where there is a need for low clearances to combustibles.
  • Up to 16” Vent Diameters: Many commercial applications require large diameter systems due to the units size and output. Large diameters are available in single and double wall, featuring FasNSeal’s triple lipped directional gaskets and built-in locking band which provides a safe and convenient installation.

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