DuraVent DuraFlex Stainless Insert Adapter: connects the liner to an insert with a flat outlet
The DuraVent DuraFlex Stainless Insert Adapter is a fitting that joins the liner’s lower end to a fireplace insert with a flat outlet on top. It fits a flat plate rather than a round collar. The installer clamps it to the liner and pulls both down into the insert together. From inside the insert, tabs bend outward to catch beneath its top plate. The liner passes through the opening for the old damper, the flap that controls chimney airflow. Its lower few feet can be shaped into an oval if that opening is narrow. Ceramic blanket packed around the liner seals the space above the insert so room air cannot escape up the old flue.
DuraFlex Stainless is DuraVent’s flexible stainless steel liner for relining a masonry chimney that vents a wood, pellet, oil, or gas appliance. Choose a 3, 4, 5, 5 1/2, 6, 7, or 8 inch diameter to match your liner. DuraVent calls for installation by an experienced professional. Have a round outlet collar? Use the DuraVent DuraFlex Stainless Sleeve fitting. The DuraVent DuraFlex Stainless Insert Adapter ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 3DFS-ADC | 4DFS-ADC | 5DFS-ADC | 55DFS-ADC | 6DFS-ADC | 7DFS-ADC | 8DFS-ADC
Applications
- DuraFlex Pro ultra flexible relining for masonry chimney. Use with gas, wood pellet, oil, or wood appliances. Applications include: fireplace inserts, furnaces, boilers, and water heaters.
- DuraFlex SW smooth wall flexible relining for masonry chimney. Use with gas, wood pellet, oil, or wood appliances. Applications include: fireplace inserts, furnaces, boilers, and water heaters.
- DuraFlex 316 flexible relining for masonry chimney. Use with gas, wood pellet, oil, or wood appliance. Applications include: fireplace inserts, furnaces, boilers, and water heaters. 316 is designed for use in harsher conditions, for more resistance to corrosion, such as coal.
- DuraFlex 304 flexible relining for masonry chimney. Use with gas, wood pellet, oil, or wood appliances. Applications include: fireplace inserts, furnaces, boilers, and water heaters.
Materials and Construction
DuraFlex Pro: Single-wall .005″ 316 stainless steel.
DuraFlex SW: Single-wall .005″ overlapped 316 stainless steel (totalling .010″). Overlapped to create smooth inner wall.
DuraFlex 316 & 304: Single-wall .005” 316 or 304 stainless steel.
Clearances
DuraFlex Pro: 0″ clearance for gas, oil, and pellet applications. 1″ clearance to masonry for wood-burning applications. Insulation is required for 0″ clearance to masonry for wood-burning.
DuraFlex SW: Clearances 0″ clearance for gas, oil, and pellet applications. ” clearance to masonry for wood-burning applications. Insulation is required for 0” clearance to masonry for wood-burning.
DuraFlex 316 & 304: 0″ clearance for gas, oil, and pellet applications. 1″ clearance to masonry for wood-burning applications. Insulation is required for 0″ clearance to masonry for wood-burning.
Diameters
DuraFlex Pro & SW: 3″ – 12″.
DuraFlex 316 & 304: 3″ – 8″.
Listings
DuraFlex Pro: Listed to UL 1777 and ULC S635 (MH45609).
DuraFlex SW: Listed to UL 1777 (MH45609).
DuraFlex 316 & 304: Listed to UL 1777 and ULC S635 (MH45609).