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DuraVent 20" - 50" Diameter FasNSeal Flex Custom Length

Original price $117.69
Original price $117.69 - Original price $117.69
Original price $117.69
Current price $94.15
$94.15 - $94.15
Current price $94.15
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DuraVent 20" - 50" Diameter FasNSeal Flex Custom Length

Use to vent Category II,III and IV gas burning appliances. Listed to UL 1738. Can only be used in vertical or near vertical runs. Custom lengths are available for 3”-12” diameters. Minimum length of 10’ for custom orders. Maximum length of 50' for 3" - 9" diameter custom orders and 25' for 10" and 12" diameter custom orders. Must be ordered in 10' increments. Use with FasNSeal components only.


  • Available Inner Diameter : "20" - "100"
  • 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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