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DVL Double-Wall

6" - 8" DuraVent DVL Increaser - 6DVL-X8

Item: COP69183

Out of stock

  • Use with DuraVent factory-built chimneys
  • 430-alloy stainless inner wall, aluminized steel outer wall
  • 1" outer diameter
  • Reduces clearances from 18" to 6" for walls
  • Reduces clearances from 18" to 8" for ceilings
  • Sturdy construction to ensure long-lasting durability
  • Creates a tight, secure connection in your venting system

This 6" to 8" increaser is used to increase from a smaller appliance flue outlet to larger diameter chimney or stove pipe.

WARNING: Carcinogens: This product can expose you to chemicals including Lead, which is [are] known to the State of California to cause cancer. For more information go to

Limited Lifetime Warranty