Southwark Metal 73C151416 Rectangular to Round Transition 15 Inches X 14 Inches X 16 Inches

Product Description

The Southwark Metal 73C151416 is a rectangular to round transition fitting designed for HVAC duct systems that require a change in shape from a rectangular duct opening to a round collar. This type of fitting is a standard component in forced-air heating and cooling installations, used wherever a rectangular trunk line or plenum must connect to a round branch duct or flexible duct run. HVAC installers, sheet metal contractors, and mechanical trades professionals rely on these transitions to maintain efficient airflow and airtight connections throughout a duct system. The 73C151416 features a rectangular inlet measuring 15 inches by 14 inches and transitions to a 16-inch round collar, making it well suited for larger residential and light commercial duct systems where high-volume airflow is required. The round collar height is approximately 3 inches, which is standard for collars of 18-inch diameter and above, providing enough surface area to secure flexible duct or rigid round duct with clamps or tape. This fitting is fabricated from 28-gauge hot-dipped galvanized steel meeting ASTM A653 CS Type B standards, which means it resists rust and corrosion in both conditioned and unconditioned spaces such as attics, crawlspaces, and mechanical rooms. The galvanized coating also ensures long service life without flaking or peeling under normal HVAC operating conditions. Manufactured in the USA, this fitting ships as a single unit and is part of Southwark Metal's 73C product family, which covers a wide range of rectangular-to-round transition sizes. The product weighs approximately 3.92 pounds and has an overall height of 12 inches, a length of 15 inches, and a width of 14 inches.

• Rectangular inlet of 15 inches by 14 inches transitions to a 16-inch round collar for high-volume branch duct connections
• Fabricated from 28-gauge hot-dipped galvanized steel per ASTM A653 CS Type B for corrosion resistance and long service life
• Made in the USA as part of Southwark Metal's 73C product family, sold individually

Product Highlights

The Southwark Metal 73C151416 provides HVAC professionals with a durable, code-compliant rectangular-to-round transition that simplifies connections between rectangular trunk lines and round branch ducts in residential and light commercial systems.

Product Information

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 73C151416

Technical Specifications

• Material: Galvanized Steel
• Gauge: 28 GA
• Rectangular Duct Size: 15 inches x 14 inches
• Round Collar Diameter: 16 inches
• Overall Length: 15 inches
• Overall Width: 14 inches
• Overall Height: 12 inches
• Weight: 3.92 pounds
• Galvanized Coating: Yes
• Country of Origin: USA
• Unit of Measure: Each