DuraVent DuraFlex Stainless – 316 Stainless Steel Length

$493.85

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15’ Flex
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35’ Flex
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DuraVent DuraFlex 316 Stainless Steel Length: added corrosion resistance for harsher fuels

The DuraVent DuraFlex 316 Stainless Steel Length is a coil of flexible stainless steel liner with ridged walls. DuraVent recommends this alloy when corrosion is a concern, such as with coal or oil containing sulfur. One coil runs from the appliance to the chimney top. It suits chimneys with few bends. 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 the diameter. Lengths from 15 to 35 feet come in diameters from 3 to 8 inches, including 5 1/2 inch. The 50 feet length comes only in 7 and 8 inch diameters. The liner is cut to fit at the job site with a metal cutting saw. It can be shaped into an oval to pass through a tight opening, though this reduces the space inside. The top plate, cap, tee connection for the bottom, and liner pulling tool are sold separately. Have several chimney bends? See the DuraVent DuraFlex Pro Stainless Steel Length liner coil. The DuraVent DuraFlex 316 Stainless Steel Length ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.

Details

SKU: 3DF316-15 | 4DF316-15 | 5DF316-15 | 55DF316-15 | 6DF316-15 | 7DF316-15 | 8DF316-15

SKU: 3DF316-20 | 4DF316-20 | 5DF316-20 | 55DF316-20 | 6DF316-20 | 7DF316-20 | 8DF316-20

SKU: 3DF316-25 | 4DF316-25 | 5DF316-25 | 55DF316-25 | 6DF316-25 | 7DF316-25 | 8DF316-25

SKU: 3DF316-30 | 4DF316-30 | 5DF316-30 | 55DF316-30 | 6DF316-30 | 7DF316-30 | 8DF316-30

SKU: 3DF316-35 | 4DF316-35 | 5DF316-35 | 55DF316-35 | 6DF316-35 | 7DF316-35 | 8DF316-35

SKU: 7DF316-50 | 8DF316-50

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).

Instructions

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Shipping / Freight / Return Info

Same-Day / 24 hour shipping

Same-Day/24 hour shipping - If we have the product in stock, we can ship same day if ordered before 12pm Monday - Friday (CST).

Freight Claims Policy

Please follow these very important steps when it comes to Freight Items that are damaged or missing
  • Open and inspect the order while the delivery driver is present. If delivery driver does not provide sufficient time to do so, please notate the delivery receipt.
  • By signing the delivery receipt without noting any damage or missing items, you confirm that your order arrived complete and in excellent condition.
  • Record any damage or missing pieces directly on the delivery receipt.
  • Do not discard damaged item(s) or any original packaging. For severe damage, write “Refused due to damage” on the delivery receipt and contact us immediately.
  • Report any damage within two business days, including delivery details and photos showing the issue
  • Damaged item(s) must be returned within 30 days. Failure to return them will result in a charge to the original payment method.

Return Merchandise Authorization Policy

Please follow these very important steps when Returning Items. Contact our team.
  • Submit your return request within 30 days of delivery.
  • You will receive an email within 1-2 business days confirming whether your return request has been approved or denied.
  • Please also note that a 20% restocking fee may apply to approved returns
  • If approved, you will receive an itemized Return Authorization, return shipping labels (if requested), and detailed instructions within 1–2 business days
  • From the date this email is received, you will have 14 days to return the product.
  • Once our distributor receives and inspects the returned item(s), your refund will be issued within 1–2 weeks
  • Items returned outside of this process or time frame are not eligible for a refund.

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