Selkirk 4"/5"/6" Firestop Spacer (Oval Type B Gas Vent)

Size: 4-Inch

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

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Selkirk 4"/5"/6" Firestop Spacer 2x6 Wall

The firestop spacers center vent in 16" O.C. stud space and serve as a firestop at the ceiling level. This is a required component for Type B 2 x 4 and multi-story Type BW installations.

Oval Type B Gas Vent

Model OV Type B Gas Vent offers all of the advantages and installation conveniences of round pipe in a compact oval design.  An aluminum inner liner designed to assure quick vent action and minimal condensation.  Complete line of components that work together with Model RV round Type B Gas Vent.

4" to 6" Diameter:
  • Aluminum inner liner
  • Galvanized outer wall
  • 4" is Listed as Type "B", Type "BW" and Type B - 2 x 4
  • 5" is Listed as Type "B" and a Type B - 2 x 4 and 2 x 6 for use in a stud wall.
  • 6" is LIsted as Type "B" and Type B - 2 x 6 for use in a stud wall
  • 4" Type "BW" installation kit available
  • Oval Firestop Spacers available for use in stud walls
  • Smart Choice warranty on all components


  • Listed to UL 441

Product Code Part No Size
164465 4OV-FS6 4-Inch
165465 5OV-FS6 5-Inch
166460 6OV-FS 6-Inch

CA Residents: 
See Prop 65 WARNING.


Lifetime Limited Warranty

Refer to the Smart Choice Warranty for full warranty details.