DuraVent DuraFlex Stainless Sleeve: joins the liner to a round appliance outlet
The DuraVent DuraFlex Stainless Sleeve is a stepped fitting that connects the liner’s bottom end to a stove or insert’s round flue collar, the exhaust outlet on top. The liner clamps around the wider end. The narrower end sits inside the collar. This is not the mortar sleeve used in a chimney wall opening. DuraFlex Stainless is DuraVent’s flexible stainless steel liner for relining a masonry chimney that vents a wood, pellet, oil, or gas appliance. Choose the diameter on this page: 4, 5, 5 1/2, 6, 7, 8, 10, or 12 inch.
DuraFlex Stainless fittings have a built in band that tightens around the liner’s ridges, without drilling or riveting the liner. For a fireplace insert, the liner passes through the old damper opening into the firebox, where the fire once burned. Ceramic blanket packed around the liner seals the space above the insert to keep room air from escaping up the old chimney. The sleeve then connects the liner to a round outlet. Have an insert with a flat outlet? See the DuraVent DuraFlex Stainless Insert Adapter for flat outlets. The DuraVent DuraFlex Stainless Sleeve ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 4DFS-SLV | 5DFS-SLV | 55DFS-SLV | 6DFS-SLV | 7DFS-SLV | 8DFS-SLV | 10DFS-SLV | 12DFS-SLV
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).