Lambro Industries 123IND 7 Inch Round Aluminum Transition Fitting

Product Description

The LAMBRO INDUSTRIES 123IND is a round-to-rectangular aluminum transition fitting designed to connect 7 inch round duct to 3-1/4 inch x 10 inch rectangular duct. It is commonly used in residential dryer exhaust and HVAC ducting systems where a change in duct geometry is required. The all-aluminum construction keeps the fitting lightweight at 0.9 pounds while providing resistance to corrosion. HVAC technicians and sheet metal installers use this fitting to adapt round flex or rigid duct runs to rectangular boot openings or equipment collars in tight installations.

This transition fitting is suited for residential duct systems that require a geometry change between round supply or exhaust duct and standard 3-1/4 inch x 10 inch rectangular duct. Typical applications include dryer venting transitions and low-profile HVAC supply runs in floor or wall cavities where rectangular duct dimensions are constrained. The fitting ships individually boxed, making it easy to handle as a single-unit replacement or new-install component.

Key Features

• Connects 7 inch round duct to 3-1/4 inch x 10 inch rectangular duct in a single fitting
• Aluminum construction offers corrosion resistance and low weight
• Lightweight at 0.9 pounds for easy single-tech handling
• Individually boxed for clean jobsite delivery and storage
• Sold as a single unit (EA)

Compatibility

Designed as an OEM-style replacement or new-install transition fitting for residential HVAC and dryer exhaust duct systems using 7 inch round duct and standard 3-1/4 inch x 10 inch rectangular duct configurations.

Installation Notes

Installation is typically performed by a licensed HVAC technician or qualified sheet metal installer. Shut down the air handling system and disconnect power before beginning any ductwork modification. Secure all duct connections with approved foil tape or sheet metal screws per local mechanical codes and SMACNA guidelines. Do not use standard cloth-backed duct tape on dryer exhaust applications.

Technical Specifications

• Round Duct Diameter: 7 inches
• Rectangular Duct Size: 3-1/4 inches x 10 inches
• Material: Aluminum
• Weight: 0.9 pounds
• Package Quantity: 1 EA

Standard Information

• Brand: LAMBRO INDUSTRIES
• Manufacturer Part Number: 123IND