DuraVent DVL Decreaser: connects a larger stove outlet to a smaller pipe
The DuraVent DVL Decreaser is a fitting that reduces the pipe size between a wood stove outlet and the stovepipe or chimney above it. DuraVent allows this change only with approval from the stove maker or your local inspector. The pipe and chimney would normally be the same diameter as the stove outlet. A reduction of just 1 inch can reduce draft, the upward flow that carries smoke out through the chimney. DVL is DuraVent’s double wall black stovepipe, the pipe that runs from a wood stove to the chimney inside the room.
Choose the 7 inch size on this page to go from 7 inches down to 6 inches. The 8 inch size goes from 8 inches down to 7 inches. Get approval for that change before ordering. DVL is required for wood stove connections in manufactured homes and is listed for use in both the US and Canada. Need to go larger instead? See the DuraVent DVL Increaser fitting. The DuraVent DVL Decreaser ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.

















































