Duravent Stove Pipe DuraTech Chimney Pipe SS, 5" x 36"

The 5DT-36SS 36-inch section is preferred when a long unobstructed vertical run is needed and minimising the number of joint connections in that run is desirable. Each joint connection in a DuraTech chimney run is a potential point for moisture infiltration, misalignment, or connection loosening over time — using longer pipe sections to cover a given height with fewer joints reduces the total number of connection points in the installation. The 36-inch section covers three times the nominal height of a 12-inch section with only one joint instead of three, making it a more efficient choice for long clear vertical runs through chases, walls, or open flue runs where intermediate access is not required. Shorter sections such as the 5DT-09SS and 5DT-12SS are used to achieve the precise total installed height calculation that typically cannot be achieved with standard 36-inch increments alone.

The nominal length of the 5DT-36SS is 36 inches, but DuraTech pipe sections overlap at each joint connection by approximately 1-1/4 inches. To calculate the actual installed length contribution of this section in a DuraTech chimney run, subtract 1-1/4 inches from the 36-inch nominal length for the joint overlap at one connection end, giving an installed length contribution of approximately 34-3/4 inches per section. This deduction applies at each connection point throughout the entire chimney run. When planning a DuraTech installation, the combination of standard pipe section lengths — 36-inch, 24-inch, 12-inch, 9-inch, and 6-inch — should be selected to achieve the required total installed height after all overlap deductions are applied.

The 5DT-36SS has a 7-inch outer diameter — the 5-inch inner flue diameter plus the 1-inch double wall on each side. The outer diameter is the critical dimension for planning the framing opening size at floor, ceiling, and wall penetrations, and for verifying that the 2-inch minimum clearance to combustibles is maintained at all points along the chimney run. When the chimney passes through standard 16-inch on-center framing, the 7-inch outer diameter of the 5-inch DuraTech fits through the framing without requiring modification of the standard framing spacing, which is one of the practical installation advantages of the DuraTech system's 1-inch wall design.

Yes. All DuraTech 5-inch components — pipe sections of all nominal lengths, elbows, tees, support boxes, flashings, and caps — use the same twist-lock connection interface and are designed to connect together within the DuraTech 5-inch system. The 5DT-36SS connects directly to any other DuraTech 5-inch component using the same twist-lock joint without adapters. A typical chimney run uses a combination of 36-inch sections for the main vertical run and shorter sections such as 9-inch or 12-inch sections to achieve the precise total height after all overlap deductions are applied. All components must remain within the DuraTech 5-inch product family to maintain system listing and warranty validity.

DuraVent's general guidelines recommend a minimum chimney height of 10 to 15 feet above the appliance outlet for a straight vertical installation at sea level. Higher elevations or the use of elbows or a tee section in the run will require approximately 30 to 60 percent more height to provide adequate draft compared to a straight vertical run, because elbows and tees introduce flow restrictions and horizontal runs that reduce draft intensity. The building code minimum requires the chimney termination to be at least 3 feet above the roof penetration point and at least 2 feet higher than any portion of the building within 10 feet of the chimney. The 5DT-36SS 36-inch sections are well suited to building the main vertical height of the chimney run to achieve these minimum height requirements efficiently.

A complete through-the-roof DuraTech 5-inch installation using the 5DT-36SS as the main vertical section typically also requires shorter pipe sections such as the 5DT-09SS and 5DT-12SS to achieve the precise total installed height. The 5DT-FRS Firestop Radiation Shield or a support box manages the ceiling or floor penetration inside the building. The 5DT-IS Attic Insulation Shield is required if the chimney passes through an attic. A roof flashing sized to the specific roof pitch provides a weather-tight seal at the roof deck. A storm collar seals around the pipe above the flashing. A chimney cap terminates the system at the top. Elbow kits 5DT-E15KSS or 5DT-E30KSS are available if the run requires an offset around structural obstructions.