DuraVent DuraFlex Aluminum Cap: keeps rain out and supports the liner
The DuraVent DuraFlex Aluminum Cap is a chimney cap that covers and supports the flexible liner at the top of a masonry chimney. It keeps rain out and carries the liner’s full weight. A clamp built into the cap grips the liner without screws. The cap rests on the raised rim of the top plate below it. DuraFlex Aluminum is DuraVent’s flexible aluminum liner for relining a masonry chimney that vents a gas appliance. The liner extends 4 to 5 inches above the crown, the chimney’s masonry top. The top plate seals against that surface with sealant that stays soft.
Choose a diameter to match your liner: 3, 4, 5, 5 1/2, 6, 7, or 8 inch. This cap comes with the liner kit but is sold separately here. You can remove it for cleaning, but the liner must be supported while the cap is off so it cannot fall into the chimney. DuraVent calls for an inspection each year. Need the plate underneath? See the DuraVent DuraFlex Aluminum Top Plate support plate. The DuraVent DuraFlex Aluminum Cap ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.

















































