DuraVent Model BV Reduction Tee: a smaller side connection for a shared gas vent
The DuraVent Model BV Reduction Tee is a gas vent fitting with a side opening smaller than its main body. It lets a smaller pipe from another appliance join a larger shared vent. It can also turn a sideways run upward. 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. Two or more gas appliances approved for Type B vent can share a vent this way, with an increaser joining the smaller pipe to the larger one.
Choose the main body and side branch sizes on this page. Pairings start with a 4 inch body and 3 inch branch and go up to an 8 inch body and 6 inch branch. A low profile double wall increaser comes with the tee. If the tee begins an upright run, close its bottom with a separately sold tee cap to keep air from entering. The DuraLock joint connects with a push, then a thumb press on the DuraTab secures it. Need matching openings? See the DuraVent Model BV Standard Tee with equal size openings. The DuraVent Model BV Reduction Tee ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 4BVTR3 | 5BVTR3 | 5BVTR4 | 6BVTR3 | 6BVTR4 | 6BVTR5 | 7BVTR4 | 7BVTR5 | 7BVTR6 | 8BVTR4 | 8BVTR5 | 8BVTR6
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).