The Unico System has changed the connection system for its flexible supply tubing, reducing the steps and time involved in the installation of its products. A provider of small-duct high-velocity central heating and cooling, The Unico System uses flexible tubing in 2- or 2.5-inch inner-diameter configurations to deliver conditioned air to various rooms within a structure. Consisting of lock-and-release tabs, new Twist-Fit couplings are attached to lengths of sound attenuator or standard supply tubing by threading the base of the coupling into the tubing’s inner core. 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. Matching Twist-Fit couplings are attached to the desired plenum take-offs, terminating outlets or additional lengths of supply tubing. To make a connection, the installer lines up the tabs to their corresponding slots and twists clockwise until a click is heard.