DuraVent DuraPlus Elbow Kit: a pair of elbows to route your chimney around framing
The DuraVent DuraPlus Elbow Kit is a pair of chimney elbows with a support strap. It lets the chimney pass around a rafter, ridge beam, or joist. One elbow turns the pipe aside, and the other returns it to vertical. DuraPlus is DuraVent’s triple wall chimney, the insulated pipe that takes over from the stovepipe at the ceiling or wall and runs up past the roof. These bends need extra chimney height to draw smoke properly.
Choose a 6 or 8 inch diameter, then a fixed 15 or 30 degree angle and a galvalume or stainless steel outer wall. Sections connect with a twist, without screws or sealant. Any screws used must stay out of the inner liner. A straight chimney needs at least 10 to 15 feet above the stove outlet. The cap must stand 3 feet above the roof exit and 2 feet above anything within 10 feet. More than 3 feet between elbows? Add a second DuraVent DuraPlus Elbow Strap chimney support. The DuraVent DuraPlus Elbow Kit ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 6DP-E15K | 6DP-E15KSS | 6DP-E30K | 6DP-E30KSS
SKU: 8DP-E15K | 8DP-E15KSS | 8DP-E30K | 8DP-E30KSS
Applications
DuraPlus Chimney is a triple-wall, all-fuel chimney for use with wood stoves, fireplaces, furnaces, boilers, stoves, ranges, water heaters, or other appliances fueled by wood, oil, coal, or gas.
Materials and Construction
.016″ 430 stainless steel outer wall or .018″ galvanized steel outer wall.
.018″ aluminized steel intermediate liner.
.016″ 430 stainless steel inner liner.
Insulated layers of ceramic blanket plus ventilated air space. Locks tightly with a precision twist-lock connection.
Clearances
2″ clearance to combustibles.
Diameters
6″ and 8”
Listings
UL Listed to UL 103HT (MH7399).
FAQ
What is in the DuraPlus Elbow Kit, and how do I order the right one?
Two matching elbows and one Elbow Strap. On the page choose the diameter first (6 or 8 inch), then the unit option: each angle is listed twice because DuraPlus elbows come with a galvalume (K) or stainless steel (KSS) outer wall, so pick the angle and finish that match your chimney. The price of each combination shows on the selector; the listed price is the 6-inch galvalume 15-degree pair.
When does a DuraPlus chimney need an elbow kit?
Only to steer around a rafter, ridgepole or joist. The first elbow starts the offset and the second returns the chimney to vertical, which is why they are sold as a pair. DuraPlus allows a maximum of two offsets (four elbows) in one chimney, and DuraVent advises avoiding offsets where possible because a straight vertical run drafts better and collects less creosote.
Can I make an offset bigger than 30 degrees?
No. UL 103 does not permit offsets greater than 30 degrees in the United States, and DuraPlus elbows are fixed at 15 or 30 degrees; the 360-degree swivel at the base only sets the direction. The DuraPlus FAQ sheet also says you cannot start an offset directly on top of a support box: fit a length of pipe first, then the elbows.
How is the offset supported, and how long can it be?
Every offset needs at least one Elbow Strap, which is in the kit; if the chimney run between the two elbows is longer than 3 feet, add a second strap around the middle of that run. DuraVent limits the offset to two 2-foot chimney sections between the elbows, and the offset table in the DuraPlus catalog gives the horizontal reach for each angle.
Do elbows change how much chimney height I need?
Yes. DuraVent’s planning guide calls for roughly 30 to 60 percent more chimney height when elbows or a tee are used, on top of the normal minimum of 10 to 15 feet of straight chimney above the appliance outlet at sea level, to keep an adequate draft. Elbows twist-lock like the pipe; screws are optional and must never penetrate the inner liner.
Will DuraPlus elbows fit a DuraTech or DuraChimney system?
No. DuraPlus is a triple-wall chimney rated to 2100 F and DuraVent does not allow it to be mixed with DuraTech or DuraChimney parts, so these elbows go on DuraPlus chimney pipe only. They keep the system’s 2-inch clearance to combustibles and its UL 103HT listing, and the stainless (KSS) finish is the one to choose for an exposed exterior run.