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  • 5'' DuraFlex AL Mortar Sleeve - 5DFA-MS

    In Stock. Shipsin 2 business days.
    Calculated at checkout

    Product Description


    • Diameter: 5"
    • Construction material: Single wall .010" aluminum (2-ply of .005")
    • Clearances: 0" to Masonry
    • Listings: Listed to UL 1777 and ULC S635

    Additional Information

    DuraFlex AL is an economical venting system used for relining masonry chimney for natural gas or liquid propane category I, draft hood equipped appliances, and appliances tested and listed to use Type B Gas Vent for a wide range of applications, including: natural gas fireplaces, gas fired furnaces, boilers, water heaters, and wall or space heating applications. DuraFlex AL also protects the masonry chimney from the damaging effects of flue product condensation.

    DuraFlex AL Relining Systems ensure safe and efficient venting of heating appliances while protecting the masonry chimney from the damaging effects of flue product condensation. DuraFlex AL, an aluminum relining system, provides and economical means to reline masonry chimney for Category 1 gas furnaces, water heaters, fireplace inserts, and non-condensing boilers and comes with a Lifetime Limited Warranty. DuraFlex AL flexible aluminum liner and components are UL Listed.

    Installation Instructions


    Chimney Relining Best Practices


    Chimney Relining For Gas Appliances

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

    Weight (lbs) 5.00
    Brand DuraFlex AL, DuraVent,
    Model 5DFA-MS
    Diameter 5 Inch
    Wall Construction Single Wall

    Warranty Information

    Manufacturer Limited Lifetime Warranty