DuraVent Model BV 7 and 8 Inch 45 Degree Adjustable Elbow: a bend for routing larger vents around framing
The DuraVent Model BV 7 and 8 Inch 45 Degree Adjustable Elbow is a vent fitting that helps route pipe around rafters or joists. Its three sections can turn a full circle around the base to line up the bend. Two elbows together create an offset, a sideways step that lets the vent pass around framing before continuing upward. The vent needs support both above and below that step. This fitting is offered as a 45 degree elbow only. 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 7 or 8 inch diameter on this page. That measurement is across the inside of the pipe and should match the appliance outlet. Fewer fittings are available in these larger sizes, so check that your planned route has the parts it needs. Working with a smaller vent? See the DuraVent Model BV 45 and 60 Degree Adjustable Elbow for 3 to 6 inch vents. The DuraVent Model BV 7 and 8 Inch 45 Degree Adjustable Elbow ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 7BVL45 | 8BVL45
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
- 3″- 30″ Round Diameter.
- 4″, 5″ and 6″ Oval (USA only)
Listings
UL Listed to UL 441 and CAN/ULC-S605 (MH2848 and MH17667).