DuraVent Model BV Large Diameter Round Adjustable Pipe: a sliding length to fill the gap
The DuraVent Model BV Large Diameter Round Adjustable Pipe is an 18 inch sliding vent section that fits over a fixed pipe to fill the remaining gap in a run. It adjusts from 3 to 16 inches in the 10 and 12 inch sizes, and from 5 to 16 inches in the 14 to 30 inch sizes. 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 10 to 30 inches on this page.
This section needs at least 2 inches of overlap and is held with two screws around the joint. It does not carry the pipe below it. It sits just beneath each supported section so the fixed pipe’s recessed edge meets the support plate. That plate also blocks fire between floors and carries up to 30 feet of vent. Allow for 1 inch lost at each pipe joint when planning the length. Need the fixed sections? See the DuraVent Model BV 10 and 12 Inch Large Diameter Round Rigid Pipe. The DuraVent Model BV Large Diameter Round Adjustable Pipe ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 10BV18A-1 | 12BV18A-1 | 14BV18A | 16BV18A | 18BV18A | 20BV18A | 22BV18A | 24BV18A | 26BV18A | 28BV18A | 30BV18A
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).