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DuraVent 3" x 4" & 4" x 5" Stepped Increaser -316

Original price $96.89
Original price $96.89 - Original price $121.07
Original price $96.89
Current price $77.51
$77.51 - $96.86
Current price $77.51
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DuraVent 3" x 4" & 4" x 5" Stepped Increaser -316

The DuraVent 3" x 4" & 4" x 5" Stepped Increaser -316 is an ideal component to complete any venting system. The 316 stainless steel material ensures reliable durability and strength, while the stepped reducer design helps to reduce the high-temperature exhaust flow according to the specifications of the job. This product is backed by a one-year warranty for customer satisfaction.


  • Available Inner Diameter : "3" & "4"
  • 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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