Shop All Chimney PipeShop All Stove PipeShop All Direct Vent PipeShop All Pellet Vent PipeShop All Type B Gas Vent PipeShop All Special Gas VentShop All Venting KitsShop All StovesShop All FireplacesPipe Help and Information CenterGet a Quote for Your Venting SystemManufacturers Installation GuidesJoin the Rewards ProgramGreat Deals and Savings

Metalbest 118320 Galvanized QC Type B Gas Vent 18" to 20" Increaser

Item #: BCI1070261
View the entire QC Collection

Offer Ends
Originally $669.82, You Save 27%
Shipping: Free Shipping! See Details
Ships In:
Ships in 3 to 4 weeks
Galvanized Tech Specs
0 In Stock
Choose a finish to see stock availability

Made To Order
Earn 487 points with the purchase of this product Learn More

and earn 350pts

Product Details for the Metalbest 118320 in Galvanized

Type B Gas Vent 18" to 20" Increaser from the QC Collection

This gas vent increaser allows you to adapt 18" diameter pipe to 20" diameter pipe when required for your application.

The QC series offers round gas vent pipe and fittings for large residential, industrial and commercial applications. Its adjustable length pipes eliminates the need for all cutting, fitting and special engineering. It features double wall pipe with built-in air space to reduce clearances and durable galvanied outer pipe with die formed ends.


  • Large residential, industrial and commercial applications
  • Materials: Galvanized steel outer and aluminum inner liner
  • Fuel: Gas
  • UL 441 listed
  • Minimum Safety Clearance to Combustibles:
    • 1" for diameters of 10" to 24"
    • 2" for diameters 26" to 48"
  • Warranty: Lifetime Limited Warranty
Our SKU: Metalbest 18QC-I20

This product is listed under the following manufacturer number(s):

*Denotes a finish or option that has been discontinued

0 Questions from the Community
Loading nanoRep

Metalbest 18QC-I20 Technical Specs

Configuration Increaser/Reducer
Fuel Type Gas
Manufacturer Warranty Lifetime Limited
Material Galvanized Steel, Aluminum
Outside Diameter 18.5, 20.5
Pipe Class Type B
Pipe Inside Diameter 18, 20
Pipe Shape Round
UL Listed Yes
Vent Construction Double Wall
Vent Pipe Size 18, 20

Buy the Metalbest 118320 in Galvanized at Research Metalbest 118320 in Galvanized online. Find Metalbest 118320 in Galvanized features and specifications. Get the best deal by comparing the Metalbest 118320 in Galvanized today.

Recently viewed items
DON'T MISS A DEAL! Sign Up For Email SAVINGS Privacy Policy