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3" DuraFlex Pro 50' Chimney Liner - 3DFPRO-50

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Product Description

DuraFlex Pro is the ultimate in flexible steel liners for strength and flexibility. It features 20% more stainless steel per foot compared to other liners on the market. Its extreme flexibility facilitates problem free installations where multiple offsets are needed. DuraFlex Pro is available in 3” through 12” diameters in lengths, kits and custom lengths. DuraFlex Pro is manufactured utilizing highly corrosion resistant 316 Stainless Steel. Listed to UL 1777 and ULC S635.


  • Diameter: 3"             
  • Construction material: Single wall .005" 316 Stainless Steel
  • Clearances: 0" to Masonry
  • Listings: Listed to UL 1777 and ULC S635

Additional Information

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.

Installation Instructions


Chimney Relining Best Practices

Chimney Relining For Gas Appliances

Click here for Home Safety when relining chimneys for gas appliances.


Weight (lbs) 9.00
Brand DuraFlex AL, DuraVent,
Model 3DFPRO-50
Diameter 3 Inch
Wall Construction Single Wall


Warranty Information

Manufacturer Limited Lifetime Warranty