Transitions linesets in two directions with built-in size flexibility with multiple reducers attached. Made of high-grade PVC for durable, weather-resistant protection and a clean finish.
The Slimduct ST Duct Tee allows linesets to branch in two directions with built-in flexibility to transition between sizes with multiple reducers attached. Ideal for exterior wall installations, it provides a clean, professional finish while saving time and effort.
Made from high-grade PVC, the ST Tee provides long-term protection against weather, vandalism, pest damage, and other environmental factors. Perfect for maintaining both function and aesthetics in HVAC systems.
This HVAC duct fitting uses high-grade PVC that resists UV rays, rain, and harsh outdoor conditions. It performs in temperatures from -4°F to 140°F, which helps protect line sets in many climates across North America.
With this ST tee, you can conceal exposed line sets and give your installation a clean, finished look. It also protects the system components and works with ductless and unitary HVAC systems.
Our duct tee is made from flame-retardant materials that add another layer of protection. This helps support safer installations while maintaining the durability needed for long-term outdoor and indoor use.
| Code No. | Item No. | A | B | C | D | E | Pcs/Pkg |
|---|---|---|---|---|---|---|---|
| C 0462 | ST-77 | 3-3/8″ | 2-3/4″ | 6-1/2″ | 5″ | 1-1/4″ | 10 |
| C 0461 | ST-100 | 4-3/8″ | 3-1/8″ | 7-7/8″ | 6-1/8″ | 1-3/8″ | 10 |
| C 0463 | ST-140 | 5-7/8″ | 3-1/2″ | 9-7/8″ | 7-7/8″ | 1-3/8″ | 5 |
| Reduces | # of reducers |
|---|---|
| ST-77-66 (For SD-66) | x2 |
| ST-100-66 (For SD-66) | x2 |
| ST-100-77 (for SD-77) | x2 |
| ST-140-100 (For SD-100) | x2 |
Q. If sealing around joints is required, what sealant should I use?
A. Use a UV-resistant silicone sealant. This helps the joint hold up better in outdoor conditions.
Q. To use as a reference when cutting the straight duct, what are the measurements of the product?
A. The center of the screw fitting hole on the straight duct is 100 mm, or about 4 inches in pitch. Both ends are about 55 mm, or about 2 inches.
Q. What are the measurements of the product?
A. Slimduct ST duct tee is available in three sizes: 3 inch, 4 inch, and 5-1/2 inch. This gives you size options for different installation needs.
Q. Can the Slimduct ST tee also be used indoors?
A. Yes, it can be used indoors. This HVAC duct fitting helps maintain a clean appearance and does not disrupt the look of the room.
Q. What can I do to mount it on the wall?
A. Use the correct mounting hardware for the wall surface or substrate. For elevated applications, use the specified option parts from the Residential Elevating System.
Q. Can SLIMDUCT SD be used with the SLIMDUCT PD series?
A. Yes, it can be used with SLIMDUCT PD. Use the PD-SD Coupler (PSDR) for proper connection.
Q. Can I use SLIMDUCT SD for other things besides a lineset?
A. Yes, SLIMDUCT SD can protect other items or piping. Follow the installation manual for proper use and application.
Q. Do I need any specific tools to install the duct tee?
A. No specialized tools are required for installation. This helps make the installation process simple and practical.
Q. What is the best way to make a straight cut?
A. Many cutting tools can be used, but the recommended option is the Slimduct Cutter (VD-2100). It is designed specifically for cutting Slimduct SD.
Q. Can I install the product in combination with another company’s lineset cover?
A. Use only other Inaba Denko products with the Slimduct ST tee. The warranty does not cover products used with outside brands.
Q. I installed the lineset cover outside, and it deformed. What should I do?
A. Deformation can happen if the product is exposed to excessive heat or if interior piping is not properly supported. Check the Instruction Manual for the correct installation method.
Q. What are the protrusions inside the SW and the SK?
A. These protrusions, or pins, fit into the duct cover holes to help prevent slipping in vertical applications. They can be removed if they are not needed.
Inaba Denko America provides contractors and distributors with HVAC accessories built for clean installations, lasting performance, and dependable results. Each product, including the HVAC duct tee, supports faster work, better protection, and a more polished finish for ductless, VRF, and unitary systems.
Inaba Denko products are engineered in Japan with a strong focus on precision, fit, and product quality. This gives you accessories that install cleanly and perform consistently across a wide range of jobsite conditions.
Each product is designed for durability in real installation environments. From sun exposure to daily wear, our accessories help protect system components and support reliable performance over time.
Our products help you create organized and visually clean installations. This improves the finished look of exposed components and helps contractors deliver work that looks professional indoors and outdoors.
From line set covers to drain hoses, copper line sets, and mounting systems, we offer solutions for many HVAC installation needs. This helps simplify product selection across ductless, VRF, and unitary projects.
The Slimduct ST Duct Tee is best used where a branch connection is needed in a line set cover system. It helps route multiple lines in an organized way while keeping the installation clean and protected.
It is a practical choice for ductless and HVAC projects that need a neat split in the duct path. Contractors can use it to maintain a polished look while managing changes in line direction.
Got questions about the Slimduct ST Duct Tee or system compatibility? The Inaba Denko America team can help you choose the right components for a clean layout, proper routing, and a smooth HVAC installation.
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