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Chimney Pipe - Class A

Class A Chimney Pipe, also called All-Fuel pipe, is designed to vent appliances fueled by wood, oil, and coal, though some brands are also approved for use with gas-fueled devices. Chimney systems created with Class A pipe are almost always UL Listed, allowing them to be compatible with a greater variety of fireplaces, wood stoves, inserts, and furnaces than other kinds of vent pipe.It is extremely important to have the correct size chimney pipe. To find the diameter of pipe you need, measure the flue opening of the appliance you plan to install. In most instances, the diameter of this opening should equal the inner diameter of the chimney pipe you use. Some types of installation, however, may affect the size of pipe you need, so it is always best to consult your appliances instruction manual prior to ordering. It is also important to note that while the diameter of your chimney can be larger than your appliances flue, it should never be smaller.




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4 Questions & 4 Answers
Kevin
from Charlottesville, VA asked:
December 6, 2013
My used Jotul woodstove appears to have a 7" flue outlet. Does class A pipe come in this diameter?
1 Answers
Yes, we carry single-wall stovepipe (DuraBlack) and class A chimney pipe (DuraTech) in a 7" inside diameter. If you want a full quote for a chimney system for your Jotul stove, please fill out our Chimney Pipe Design & Quote Form.
Tyler
on December 6, 2013

Dee
from Ohio asked:
November 10, 2013
Can you connect twist lock pipe to MetalBest pipe?
1 Answers
MetalBest Class A chimney uses twist lock lances that are specific only to the MetalBest product line. As such, other brands will not attach properly.
Collin
on November 11, 2013

Todd
from Baltimore asked:
March 19, 2013
Does 10 inch Class A pipe need to run through a thimble on a rubber covered corrugated steel roof?
1 Answers
No, but the pipe will need 2" of clearance all the way around it as it penetrates the roof. There are rubber boot flashings and dead-soft aluminum flashings available by some class A manufacturers for the top side of the roof after penetration.
Tyler
on March 19, 2013

Jerry Forrest
from Aransas Pass, Texas asked:
January 2, 2013
I have a wood-burning cast iron stove in my workshop with a six-inch outlet that I want to vent through a pre-existing 8-inch outlet in my roof. It's about 12 feet from the top of my stove to the roof, and the pipe is passing through open ceiling joists. What do I need in order for this to be a safe and proper installation?
1 Answers
It is recommended to vent any appliance only with diameter of pipe common to the flue outlet. Increasing from the stove's 6" collar to the 8" chimney could result in a poor draft or increased creosote buildup. In order to recommend components to achieve this transition, we need more information regarding the existing components. Could you please reply with the manufacturer/brand of the existing chimney system? This information is necessary in making an accurate recommendation.
Kevin
on January 3, 2013