DuraVent DuraFlex Pro Stainless Steel Length: a flexible coil for chimneys with several bends
The DuraVent DuraFlex Pro Stainless Steel Length is a coil of flexible stainless steel liner that goes inside an existing brick or block chimney. Its deeper folds and 20 percent more steel per foot than DuraVent’s other liners let it bend through several changes in direction without kinking. Made from 316 stainless steel, it straightens itself as it comes out of the box. 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 length first, then a diameter from 3 to 8 inches, including 5 1/2 inch. Lengths run from 15 to 35 feet in every size, with 50 feet available in most sizes. The liner is cut to fit on site with a hacksaw or a reciprocating saw fitted with a metal blade. Match the diameter to the appliance outlet or incoming vent pipe. Only use a smaller diameter if a qualified person has sized it. The top plate, cap, tee, and puller are sold separately. Relining a straight chimney? Consider the lower priced DuraVent DuraFlex 304 Stainless Steel Length coil. The DuraVent DuraFlex Pro Stainless Steel Length ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 3DFPRO-15 | 4DFPRO-15 | 5DFPRO-15 | 55DFPRO-15 | 6DFPRO-15 | 7DFPRO-15 | 8DFPRO-15
SKU: 3DFPRO-20 | 4DFPRO-20 | 5DFPRO-20 | 55DFPRO-20 | 6DFPRO-20 | 7DFPRO-20 | 8DFPRO-20
SKU: 3DFPRO-25 | 4DFPRO-25 | 5DFPRO-25 | 55DFPRO-25 | 6DFPRO-25 | 7DFPRO-25 | 8DFPRO-25
SKU: 3DFPRO-30 | 4DFPRO-30 | 5DFPRO-30 | 55DFPRO-30 | 6DFPRO-30 | 7DFPRO-30 | 8DFPRO-30
SKU: 3DFPRO-35 | 4DFPRO-35 | 5DFPRO-35 | 55DFPRO-35 | 6DFPRO-35 | 7DFPRO-35 | 8DFPRO-35
SKU: 3DFPRO-50 | 4DFPRO-50 | 5DFPRO-50 | 55DFPRO-50 | 6DFPRO-50 | 7DFPRO-50 | 8DFPRO-50
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).