TWIST FIT SYSTEM
THE UNICO TWIST FIT SYSTEM™ FOR 2" (51MM) FLEXIBLE SUPPLY TUBING
At this time, this product is only available for our 2" (51mm) duct component line.

The new supply duct connection system reduces the steps and time involved in the installation process.
Consisting of lock-and-release tabs making it easier and faster to assemble, Twist-Fit couplings are attached to lengths of sound attenuator or aluminum supply tubing by threading the base of the coupling into the inner core of the tubing. The internal insulation and outer mylar jacket of the supply tubing are then tucked into the rim of the Twist-Fit and the connection is secured with UL-181B foil tape.*
*All tubing is supplied with couplings already attached from the factory.
Matching Twist-Fit couplings are attached to the desired plenum take-offs, outlet registers, or additional lengths of supply tubing. To make a connection, simply line up the tabs to their corresponding slots and twist clockwise until a click is heard. At least one Twist-Fit connector must have a gasket to prevent leakage.
Available in 3-Foot Sections
If you believe in the traditional saying that “time equals money” the Unico 3-foot sections of attenuator tubing are going to provide substantial savings in both areas. Because they are modular in design with quick connect fittings, they minimize the need for custom cuts and the production of time-consuming connections in the field. Check out the various benefits below of the Unico Twist Fit 3-foot tubes.
TFS - 3-Foot Section Benefits
- Makes it easy to connect to end of longer aluminum core supply tubes!
- No need to cut 12 ft attenuator tubes in shorter sections!
- Available in quantities of 1 or 6 so you can get the perfect amount for your installation!
Twist-Fit System Kits
Another place Unico saves you time and money are in the area of ordering the various connection pieces to support the use of the 3-foot sectional pieces. No longer do you have to order all the individual pieces which can be both confusing and time consuming.
Whether your job or project requires 1 set of connectors or 6 sets, we have a Unico Kit for you.

When it comes to convenience and having everything for your next installation at your finger- tips, Unico has the perfect answer.
We have redesigned our Twist Fit Installation kits to provide all the items you need that are perfect for working with our 3-foot sections of the Twist Fit Product line.
The installation kit includes the supply outlets, take offs, couplings and more.
TFS Kit Benefits
- Back by customer demand! Install kits give you the all the hardware to install a supply tube in one single kit!
- Different kits for any plenum! Round metal, flat metal or fiberglass!
- Different kits for any plenum! Round metal, flat metal or fiberglass!
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Unico Customer CareHave questions or need technical help?
Contact Technical SupportFeatures & Benefits of the Twist-Fit System
The Unico Twist Fit system leads the SDHV category when it comes to performance, design features and money saving alternatives for custom new home designs or renovation projects. The features noted below add value to every project regardless if it is an existing structure being renovated, or a new project being initiated from the ground-up.
Twist Fit Features & Benefits
- Lock-and-release tabs for easy assembly
- Couplings attached to tubing at the factory
- Change outlet face plates in a snap
- Compatible with other high velocity products
- Simplified module guide for ordering ease
- More order options to order exactly what you need for your project
- Reduce supply tube installation time by as much as 50%!
Support Documents
Installation & Replacement Guides
- Twist-Fit System Installation Instructions
- Twist-Fit System Module Guide
- Twist-Fit System Parts
- Twist-Fit System Replacement Cheat Sheet
TFS System Sell Sheets
Videos on the Twist-Fit System
To learn more about the entire Twist Fit Line and to see how it all comes together, view our video presented by Jason Church of our Unico University team.