DuraVent Universal B Vent to Aluminum Flex Adapter: keep your existing B vent when relining the chimney
The DuraVent Universal B Vent to Aluminum Flex Adapter is a connector that joins an aluminum chimney liner to any brand of B vent, the gas vent pipe from your appliance. It lets that existing pipe stay in place when you add a liner, saving installation time and replacement costs. DuraFlex Aluminum is DuraVent’s flexible aluminum liner for relining a masonry chimney that vents a gas appliance. Older brick or block flues are often too large for modern gas appliances. The liner gives exhaust a smaller, smooth passage and keeps corrosive moisture away from the brick and mortar.
This adapter sits outside the chimney wall at the liner’s lower end. The liner passes through a sleeve grouted even with the masonry and extends at least 2 inches beyond it. Choose a 3, 4, 5, 6, 7, or 8 inch diameter to match your liner. Connecting to DuraVent’s own Type B pipe? The usual connector is the DuraVent DuraFlex Aluminum Female Flex Adapter. The DuraVent Universal B Vent to Aluminum Flex Adapter ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 3DFA-ADBV | 4DFA-ADBV | 5DFA-ADBV | 6DFA-ADBV | 7DFA-ADBV | 8DFA-ADBV
Applications
Duravent’s Type B Gas Vent system. Use with natural gas or liquid propane Category I and draft hood equipped appliances, and appliances tested and listed to use Type B Gas Vent. Applications include: natural gas fireplaces, gas-fired furnaces, boilers, water heaters, and wall or space heating applications.
Materials and Construction
Round Type B Gas Vent 3″ – 8″ and Oval 4″ – 6″: Aluminum .012″ inner wall, galvanized .018″ outer wall, in Canada, the lengths have a galvalume .018″ outer wall. The 3″ – 8″ Round gas vent features DuraLock® and DuraTab® . The Oval gas vent features the button lock.
Round Type B Gas Vent 10″ – 18″: Aluminum .014″ inner wall, galvanized .018″ outer wall. DuraLock® feature for 10″ and larger diameters.
Round Type B Gas Vent 20″ – 30″: aluminum .023″ inner wall, galvanized .018″ outer wall. DuraLock® feature for 10″ and larger diameters.
Clearances
Clearances to combustible materials in single and multi-family dwellings:
- 1″ Clearance – USA – 3″ to 30″
- 1″ Clearance – Canada – 3″ to 24″
- 2″ Clearance – Canada – 26″ to 30″
Annular insulating air space
- 3″ – 8″ Round Vent: 1/4″ air space
- 4″ – 6″ Oval Vent: 1/4″ air space
- 10″ – 30″ Round Vent: 1/2″ air space
Diameters
Listings
UL Listed to UL 441 and CAN/ULC-S605 (MH2848 and MH17667).