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Triple Wall Chimney Pipe

Triple Wall Chimney Pipe

Choosing the correct Chimney and Stove Pipe for your project is more important than selecting your appliance. Choosing the correct venting configuration can help improve air flow, draft and can improve the safety and efficiency of your entire heating system. Choosing the wrong chimney pipe can cause inadequate draft and can also lead to creosote buildup, which in turn can lead to chimney fires,

Triple Wall Chimney and Stove flue pipe is the premier vent pipe for wood stoves, fireplaces and a variety of other appliances

Triple Wall Pipe is also referred to as Class A pipe is generally made of a stainless steel outer wall and can be used on a variety of appliances including wood stoves, fireplaces, furnaces, boilers, ranges, water heaters and other appliances that are fueled by wood, coal, oil and gas. They are designed to be used under continuous operation of your venting appliance and if installed correctly and cleaned and maintained on a regular basis, they will last for years.

The triple wall construction consists of three layers: An inner wall, an insulating layer and an outer wall. Each layer adds to the construction and performance of the chimney system. It allows for draft on the inside of the pipe thus increasing fireplace and stove efficiency.

Inner Wall: The innermost layer of the pipe is usually made of stainless steel or other high-temperature resistant materials. It comes into direct contact with the hot flue gases and is designed to withstand the corrosive and high-temperature conditions that are created from your heating appliance.

Insulating Layer: The second layer of the triple wall pipe is called the insulating layer and consists of material that provides a barrier between the inner and outer walls. The insulating layer reduces the temperature on the outer surface of the chimney pipe, making it safe to pass through walls, ceilings, or other combustible materials. This layer is what allows the clearances to be reduced from using this type of venting. The insulating layer in some brands is known as a ceramic blanket.

Outer Wall: The outermost layer of the pipe is usually made of galvanized steel or another corrosion resistant material. It provides additional protection and durability to the chimney pipe.

Triple-Wall Chimney Pipe comes in different sizes including 6 inch, 7 inch, 8 inch and 10 inch

It is always recommended to consult your appliance installation manual to determine the appropriate size of venting for your application. The most common sizes of triple wall pipe are 6 inch, 7 inch and 8 inch options. These are the sizes you are going to find more readily available. Each serves a different size heating appliance.

The 6 inch triple wall chimney pipe is commonly used for smaller heating appliances, such as wood stoves or pellet stoves. Normally 6 inch triple wall is approved for use only in residential settings.The 7 inch triple wall chimney pipe is often used for medium sized heating appliances and wood stoves. You will find 7 inch chimney pipe used mainly in residential and small commercial applications. The 8 inch triple wall chimney pipe is used for those larger heating appliances. These can include high output wood stoves and fireplace as well as being used in some commercial applications.

For industrial projects and larger commercial applications your installation could call for the use of 10 inch triple wall chimney pipe or even larger diameters. These are very rarely used in a residential setting.

Please Note: All Stove & Chimney Pipe and components are chosen and classified by the inside diameter. For example if your chimney flue has a 6 inch Inside Diameter then you will want to choose products from the 6 inch Stove and Chimney Pipe categories.

Northline Express recommends Duraplus and Duravent brand Triple Wall Chimney Pipe

Check out our full line of Duraplus Triple Wall Chimney Pipe

It is never allowed to mix brands of chimney and stove pipe. The entire run must be from the same manufacturer. Each manufacturer makes slightly different locking systems for the pipes to fit together and when mixing brands these connections will not offer a secure and safe fit. Using even one component from a different brand will void any and all warranties from your pipe and appliance manufacturers.

No brand of venting labels their chimney components, so it is also a good idea to keep the paperwork for your venting during initial installation, so that way if you do need to replace a component you will know which brand your system is.

The first step when planning an installation is to use Northline Express handy Chimney Wizard

The Chimney Wizard will take you step by step through your project and will help you select all of the components that you will need for your installation. This Wizard will help you select the Triple Wall pipe kit that is customized to your specific project.

Triple wall Class A pipe is the preferred solution for homeowners installing their own chimney system. Triple Wall Class A pipe has an increased margin of safety due to its construction.

  • 2" Clearance to combustibles
  • UL Listed to UL 103HT (MH7399)

FAQ - Triple Wall Chimney Pipe

How much clearance does triple wall pipe need?

In most applications the Triple Wall Class A pipe has a 2 inch clearance to combustible materials. Making it ideal to go through walls, and ceilings. It is required to look at the manual to make sure you are using all of the proper components for your installation and that you follow all state and local guidelines for installation.

What is the diameter of a triple wall chimney pipe?

All Chimney Pipe is sized based on the diameter of the inside wall of the pipe. So a 6 inch pipe will be 6 inches on the inside. If you are trying to determine the outside dimension of the pipe then you will want to add about 2 inches to the pipe. 6 inch pipe will be 6 inches on the inside and 8 inches on the outside. All components you will buy will also be listed as 6 inches. So a 6 inch elbow or a 6 inch chimney cap will fit on a 6 inch pipe, even though the outside diameter is 8 inches.

What is triple wall stove and chimney pipe used for?

Triple Wall Chimney Pipe is also referred to as Class A pipe and can be used on a variety of appliances including wood stoves, fireplaces, furnaces, boilers, ranges and more.

How does triple wall stove and chimney pipe work?

Triple wall chimney and stove pipe creates a system to vent the exhaust gases and smoke produced by heating appliances such as fireplaces and wood stoves. The chimney and stove pipe creates draft which pulls outside air down from the roof and at the same time pushes the combustion byproducts up and out of the building. Triple wall chimney pipe has an extra layer of insulation that helps keep the outside of the pipe cooler to make it safer to use throughout the home.

When should I use triple wall stove pipe or when is it required?

It is always a good idea to check with your local building inspectors as well as the appliance manual to determine the best type of venting to use. In most cases Triple Wall Class A chimney pipe is needed whenever a homeowner is installing an appliance and needs to run chimney pipe through a wall or through a ceiling. As soon as the venting is going to pass through a wall, or ceiling then it usually needs to be Class A pipe that is used from that point through complete termination above the roof line.

How hot does triple wall pipe get?

Brands can vary slightly, but in most cases the triple wall pipe is designed for normal, continuous operation at 1000°F flue gas temperatures. If the Triple Wall pipe is UL listed then it is subjected to rigorous and stringent HT requirements of the UL standard, including one hour at 1400° F, plus three separate ten minute chimney fire tests that are done at a temperature of 2100 degrees Fahrenheit

Where should I buy Triple Wall chimney and stove pipe?

Northline Express offers a full line of Triple Wall Stove and Chimney Pipe.

Where can I go to learn more about Chimney Pipe?

You can check out our Resource Center for helpful articles. Also remember to check out The Chimney Wizard.