DuraVent Model BV Adjustable Steep Roof Flashing: for vent pipes passing through steep roofs
The DuraVent Model BV Adjustable Steep Roof Flashing is a tall metal cover for the opening where your gas vent passes through the roof. It adjusts to roof slopes from 6 in 12 to 12 in 12, the steepest pitch DuraVent offers a flashing for. The upper edge of its base sits beneath the roofing, while the lower edge lies over it. Model BV is DuraVent’s Type B gas vent, the double wall pipe that carries the exhaust from a gas furnace, boiler, or water heater out of the house.
Choose a diameter from 3 to 8 inch to match your vent. These sizes measure the inside of the pipe and match the appliance outlet. The storm collar is sold separately. It sits above the flashing, with a bead of silicone at the collar. A steeper roof needs a taller vent termination. At a 12 in 12 pitch, the cap must stand at least 4 feet above the roof and at least 8 feet from any wall. Have a lower roof slope? See the DuraVent Model BV Adjustable Roof Flashing for flat to 6 in 12. The DuraVent Model BV Adjustable Steep Roof Flashing ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 3BVFSR | 4BVFSR | 5BVFSR | 6BVFSR | 7BVFSR | 8BVFSR
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).