Southwark Metal SP58-24GA_12X10 Spiral Pipe Reducer 24GA

Product Description

The SOUTHWARK METAL SP58-24GA_12X10 is a tapered sheet metal spiral pipe reducer designed to transition between two round duct diameters in forced-air HVAC systems. Built from hot dip galvanized steel at 24 gauge, it connects a 12-inch diameter duct to a 10-inch diameter duct. The tapered design maintains smooth airflow through the transition, reducing turbulence and static pressure loss. This reducer is manufactured to ACCA and SMACNA standards, making it appropriate for commercial and residential duct systems where code-compliant fittings are required. Sheet metal contractors and HVAC installers use this fitting in trunk-and-branch and spiral duct layouts.

This fitting is used wherever a round spiral duct system requires a concentric diameter reduction, such as transitioning off a main trunk or stepping down branch runs. It is suited for residential forced-air systems and light commercial HVAC applications using round spiral ductwork. The 12-inch to 10-inch sizing is common in supply-side trunk reductions and large-branch connections. Installers working with spiral duct systems will find this fitting compatible with standard spiral pipe and fittings in the same gauge range.

Key Features

• Tapered concentric reducer transitions 12-inch diameter duct to 10-inch diameter duct
• Hot dip galvanized steel construction resists corrosion in conditioned and unconditioned spaces
• 24 gauge material thickness meets SMACNA duct construction standards for round spiral duct
• Manufactured to ACCA and SMACNA applicable standards for code-compliant installations
• Smooth tapered interior profile minimizes static pressure loss through the transition

Compatibility

Designed as an OEM-style fitting for round spiral duct systems using 12-inch and 10-inch diameter pipe. Meets ACCA and SMACNA applicable standards for use in residential and light commercial forced-air HVAC duct systems.

Installation Notes

Sheet metal contractors and licensed HVAC technicians typically install spiral duct reducers as part of a complete duct system assembly. Secure the fitting to adjoining spiral pipe using sheet metal screws and seal all joints with UL 181-rated mastic or foil tape per SMACNA guidelines. Always shut down and de-energize the air handling unit before making connections in the duct system. Do not reduce airflow beyond design parameters without verifying system static pressure with a manometer.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Material Thickness: 24 Gauge
• Larger End Diameter: 12 inches
• Smaller End Diameter: 10 inches
• Type: Tapered Reducer
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: SP58-24GA_12X10