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Type B Vent Pipe

Type-B vent pipe is an option for venting a fireplace that makes use of air within the room to aid combustion. Type-B vent pipe is a little less efficient that direct venting, but it saves space, is relatively easy to install, and costs less than some other types of vent pipe. If this sounds like it fits your needs, browse our large array of high-quality, low-priced Type-B vent pipe and get your project started today.
By kenda moody from St. Louis, MO on December 22, 2012
I have a wood-burning fireplace that has a zone heating kit. It calls for B-vent pipe to run from the fireplace to the heat vent. Is there a substitute for B-vent?
By Collin C. - NFI Master Hearth Professional on December 23, 2012

Answer:
It is likely you could use either a rigid or flexible B-vent pipe to accomplish this, but it must be one of the two. B-vent piping has a dual wall setup and would be needed for proper clearances. We carry a large line of B-vent piping manufactured by Simpson Duravent and Metalfab.

By John from Cleveland on November 26, 2012
My B-vent Pipe has a diameter of 7.56 inches. Which storm collars and caps should I use?
By Collin C. - NFI Master Hearth Professional on November 27, 2012

Answer:
I am assuming that this measurement is the outer diameter? If so, this is indeed 7 inch diameter B-vent piping and can use the Metal-Fab Type B Round Chimney Pipe Storm Collar - For Chimney Pipes with a 7 Inch Inner Diameter and the Metal-Fab Type B Round Universal Chimney Vent Cap - For 7 Inch Chimney Systems. Both items are designed with flexibility in mind and can be used with numerous brands of B-vent pipe.

By Dale from Grants Pass, OR on October 27, 2013
I have standard 6" black single wall stove pipe on my shop wood stove, rising 20 feet up through the metal roof. It is all open space, with no second story floor in this section. I need a cap to replace the type of rain cap on top. Do I use b-vent or what kind of cap?
By Chris on October 28, 2013

Answer:
I would recommend the HomeSaver Pro 6 Inch Round Chimney Cap.

By Kevin from Indianapolis, IN on April 22, 2013
I currently have a 12" diameter Type B Double Wall twist lock flue pipe, surrounded by a fake chimney above the roof. I want to remove the fake chimney, do you know if I need the fake chimney to support my pipe? Will I need a brace? Will my pipe leak into my house?
By Collin C. - NFI Master Hearth Professional on April 23, 2013

Answer:
Due to the diameter of your piping, it is likely that the pipe will be self supporting without an issue. It is recommended that a brace be used if the pipe projects 5 feet or more above the roof. The pipe is designed to be air tight and will have at least one inch of overlap at each pipe joint. As such, water should not make its way into the pipe if the sections are attached properly. You should only need to add a roof flashing and storm collar in order to complete the transition to a free standing pipe.

By Karen from Ely, MN on May 29, 2013
Where can I buy an 8 inches long x 3 1/2 wide oval to round adaptor for a U.S. Stove Company Ranch Stove?
By Tyler M. - NFI Certified Specialist on May 29, 2013

Answer:
For your application, we recommend contacting a local machine shop or sheet metal fabricator to have an oval-to-round adaptor custom-made.

By Ray on November 9, 2012
I needed to break down a 8Ē vertical B-vent for a gas fireplace, for renovation of the area. I am now trying to re-install it. I am having trouble getting the pipe to go back together. I get the inside pipe to fit but canít get the outside to slip on. Any tips or tricks?
on November 9, 2012

Answer:
Do you know the brand of pipe with which you are dealing? Does the pipe feature twist-lock connections at the ends? You mention an inner and outer pipe. Are they two separate pipes? If so, what is the dimension of the inner pipe? We look forward to your response.

By Kozmev from Suffolk County, NY on September 19, 2013
Can Type B Vent Pipe can be used for an oil fired boiler? Can you please tell me which type of pipe I have to use for this oil fired boiler? The pipe must be run straight up to the roof inside of the house.
By Collin C. - NFI Master Hearth Professional on September 20, 2013

Answer:
Oil fired boilers and stoves create highly corrosive flue gases. As such, type B vent pipe cannot be used. Class A chimney must be used to vent this type of appliance.

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