Southwark Metal 581816 3-piece Galvanized Steel Duct Reducer 18 Inches X 16 Inches Crimped End

Product Description

The Southwark Metal 581816 is a 3-piece galvanized steel duct reducer designed for HVAC ductwork installations where airflow must transition from an 18-inch diameter to a 16-inch diameter section. This reducer is a core component in sheet metal duct systems used by HVAC contractors, sheet metal workers, and mechanical trade professionals. It is manufactured in the USA from 28-gauge galvanized steel, giving it strong resistance to corrosion and long service life in both residential and light commercial applications. The crimped end design allows for easy insertion into adjoining duct sections without additional modification, saving installation time on the job site. The 3-piece construction provides a consistent, well-formed taper that promotes smooth airflow transition and minimizes turbulence as air moves through the system. This helps maintain system efficiency and reduces pressure drop at the transition point. Duct reducers like the 581816 are used when a main trunk line steps down to a smaller branch run, or when equipment connections require a change in duct size. Proper sizing and a tight fit at each joint are critical for maintaining system static pressure and overall HVAC performance. This unit measures 18 inches in length and 9.75 inches in height, with an 18-inch inlet and a 16-inch outlet. The galvanized coating meets standard requirements for sheet metal ductwork in forced-air heating and cooling systems. It ships as a single unit and is sold individually. Prop 65 compliance is noted for California jobsites. HVAC techs working on residential retrofits or new construction will find this reducer a reliable, ready-to-install fitting.

• 3-piece galvanized steel construction for durability and corrosion resistance in forced-air duct systems
• Crimped end allows for fast, tool-minimal connection to standard round duct sections
• Made in the USA from 28-gauge galvanized steel with consistent forming for reliable airflow transition

Product Highlights

The Southwark Metal 581816 delivers a dependable 18-inch to 16-inch duct transition built to standard HVAC sheet metal specifications. Its crimped end and galvanized finish make it a practical, job-site-ready fitting for residential and light commercial duct installations.

Product Information

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 581816

Technical Specifications

• Product Type: 3-Piece Duct Reducer
• Size: 18 inches to 16 inches
• Length: 18 inches
• Width: 18 inches
• Height: 9.75 inches
• Gauge: 28 GA
• Material: Galvanized Steel
• Galvanized Coating: Yes
• End Type: Crimped
• Weight: 3.2 pounds
• Dimensional Weight: 24 pounds
• Cubic Measurement: 1.8281
• Country of Origin: USA
• Prop 65: Yes
• UPC: 099274520697
• Unit of Measure: Each