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Metal-Fab 4" x 18" Type B Double Wall Round Gas Vent Pipe UL Listed with SureLock Technology (#4M18)

Price: $16.72 & FREE Shipping
In stock.
Usually ships within 4 to 5 days.
Ships from and sold by ContractorsStock.
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  • PLEASE NOTE: Vent overlaps 1.5" when joined together, thus assembled length is 1.5" less than listed length.
  • SURELOCKTM B-VENT LOCKING SYSTEM: The design of the SureLockTM B-Vent System is unique. The male end of the pipe features a square dimple, positioned in the exact location to match the tab that is located on the female end of the pipe. When the pipe is joined and twisted until it stops, the SureLockTM tab can be pushed into the square dimple, therefore creating a positive twist lock that cannot be twisted apart. So unique that a patent is pending.
  • FOR YOUR REFERENCE: Metal-Fab round and oval type-b gas vent is listed by Underwriters Laboratories, Inc. for use with approved gas furnaces, heaters, fireplaces and boilers. Metal-Fab meets or exceeds all recognized gas venting codes, standards or requirements, whether local, state or United States. Maximum temperature rating for b-vent is 530 degrees F. 1" minimum clearance to combustibles for 3" through 24" diameters.
  • MATERIAL SPECIFICATIONS: The outer wall is constructed of galvanized steel, .018" thick G-90 for sizes 3" to 14" diameter, and .024" thick G-90 for sizes 16" to 30" diameter. The inner wall is constructed of aluminum alloy, .012" thick for sizes 3" to 8" diameter and .018" thick for sizes 10" to 30" diameter. The vent includes an integral, annular insulating air space, 1/4" thick for sizes 3" to 6" diameter.
  • ADAPTABILITY: Metal-Fab round B-Vent has been evaluated and listed by Under writers Laboratories, Inc., to mate with other specifically identified and UL listed round gas vent, in 3" through 6" diameters. Metal-Fab's approval covers connections at both the male (outlet) end, and the female (inlet) end to the following B-Vent products: General Products Co., Inc. (Airjet); American Metal Products Co. (Amerivent); Hart & Cooley (Metlvent); Household Manufacturing Inc. (Metalbestos & Airmate); Mitchell Metal Products Inc. (Mitchvent); Selkirk Metalbestos (Metalbestos); Simpson Dura-Vent Inc. (Duravent); ECCO Heating Products (ECCO Manufacturing); At the male (outlet) end of compatible gas vent, add an adapter or adjustable length (Series M6A, M12A, or M18A) - then add sections of Metal-Fab pipe. At the female (inlet) end of compatible vent simply insert the male end of Metal-Fab B-Vent into the compatible gas vent and secure per instructions.
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$16.72 & FREE Shipping In stock. Usually ships within 4 to 5 days. Ships from and sold by ContractorsStock.

Frequently Bought Together

  • Metal-Fab 4" x 18" Type B Double Wall Round Gas Vent Pipe UL Listed with SureLock Technology (#4M18)
  • +
  • Metal-Fab 90 Degree Gas Vent Adjustable Elbow - 4 Inch
Total price: $36.67
Buy the selected items together

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Product Description

Metal-Fab's round and oval Type-B vent is listed by Underwriters Laboratories for use with approved category 1 gas furnaces, heaters, and boilers. A category 1 appliance operates with a non-positive vent static pressure. The double wall design of B-vent enables the product to be used in homes and commercial buildings at close clearance to combustibles. Metal-Fab's B-vent design incorporates features that make installation quick, easy, and safe. Some of those features are: Elimination of sharp edges by hemming the flue and casing; Assembly & disassembly, without tools, using positive twist lock; -- UL listed to mate with other specifically identified and listed round gas vent, 3" thru 6" diameters, allowing you to add a new run of Metal-Fab B-vent to an existing run of common vent. Metal-Fab 3"-6" diameter B-vent pipe is now standard with new Surelock® B-Vent Locking System. The patented locking system provides a secure lock with just the push of a tab, and can be easily disassembled by pulling the tab back out.

Product Information

Technical Details

Part Number 4M18
Item model number 4M18
Material galvanized steel
Item Package Quantity 1

Additional Information

Customer Reviews
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Best Sellers Rank #774,539 in Home Improvements (See top 100)
#2,015 in Home Improvement > Building Supplies > HVAC > Ducting
Shipping Weight 11 pounds (View shipping rates and policies)
Date First Available September 14, 2012

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