DuraVent Model BV Round Adjustable Pipe: a sliding length that fills the gap between fixed sections
The DuraVent Model BV Round Adjustable Pipe is a sliding section that fits over fixed vent pipe. It fills the gap at an appliance connector, roof cap, or elbow and lets you take the run apart later. 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 short or long, then the diameter. Short adjusts from 3 1/2 to 10 1/2 inches in 3 to 8 inch diameters. Long adjusts from 6 to 16 inches in 3 to 6 inch diameters.
Fixed sections run from 6 to 60 inches. Pipe and fittings are never cut, so this piece fills the remaining distance and accommodates expansion. Keep at least 1 1/2 inches overlapping. It cannot carry pipe below it. A vertical run needs support near its base, a firestop closing each floor or ceiling opening, and an attic shield in the attic. Sideways runs need support every 5 feet. Need fixed sections? See the DuraVent Model BV Round Rigid Pipe lengths. The DuraVent Model BV Round Adjustable Pipe ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 3BV12A | 3BV18A | 4BV12A | 4BV18A | 5BV12A | 5BV18A | 6BV12A | 6BV18A | 7BV12A | 8BV12A
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).