Choosing industrial ductwork shouldn’t come down to the price per foot of straight pipe. While spiral pipe may offer a lower initial material cost, US Duct and US Tubing are designed as complete systems that provide advantages in installation speed, durability, adjustability, sealing, and long-term value. This article compares spiral pipe with US Duct and US Tubing, highlighting key differences in construction, connections, leakage performance, field installation, and lifecycle costs. US Duct offers a strong, modular, adjustable solution for dust collection, most fume applications, and industrial air movement, while US Tubing provides a guaranteed leak-free connection for applications where air or fluid cannot escape. With clamp-together installation that can reduce installation time by approximately 70%, plus components that can be disassembled, modified, and reused, US Duct and US Tubing can deliver value well beyond the initial material price. The right choice ultimately depends on the system’s specific requirements for strength, sealing, installation speed, adjustability, and long-term flexibility.
Reducers
Details
Step a larger-diameter duct down to a smaller one with a smooth, tapered Reducer that keeps airflow moving efficiently through the size change. Built for modular dust collection and ventilation systems, it installs in seconds and just as easily comes apart for cleaning, resizing, or reconfiguring a run.
Whether you're tying a main line into a smaller drop or matching a machine port to your existing duct, a reducer keeps the transition clean and the airflow smooth.
RR05.G18: steps a 5-inch duct down to a 4-inch connection
RR06.G18: steps a 6-inch duct down to a 4-inch connection
RR06.G18: steps a 6-inch duct down to a 5-inch connection
RR08.G18: steps an 8-inch duct down to a 6-inch connection
Features
- Rolled-lip ends connect to Quick Clamp Clamp-Together Duct (CTD)
- 18-gauge galvanized steel
- Smooth, tapered transition between diameters for efficient airflow
- Tool-free assembly and reconfiguration
Talk to a Duct Guy or Gal
Get started on a solution tailored to your needs, or explore our range of inline separators, self-dumping hoppers, and bag houses for even more ways to optimize your workspace.


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