Southwark Metal 122SC-18 Ductboard Snaplock Collar 18 in

Product Description

The SOUTHWARK METAL 122SC-18 is an 18-inch ductboard snaplock collar designed for connecting rigid fiberglass ductboard systems. This fitting creates a secure, snap-lock mechanical joint between ductboard sections or between a ductboard trunk and a branch takeoff. It is compatible with ductboard wall thicknesses in the 1.5-inch to 2-inch range. HVAC installers and sheet metal contractors use this collar during new installation or retrofit work on residential and light commercial forced-air systems.

This collar is suited for low-pressure forced-air ducting applications where ductboard is the primary distribution material. It is commonly installed at plenum connections, inline duct joints, and branch collar transitions on systems using fiberglass ductboard. The 18-inch diameter makes it appropriate for main trunk or large branch connections in residential or small commercial HVAC layouts.

Key Features

• 18-inch diameter fits large trunk and main branch ductboard connections
• Snaplock design provides a mechanical fit without additional fasteners at the joint
• Compatible with ductboard wall thicknesses from 1.5 inches to 2 inches
• Designed for low-pressure forced-air duct systems

Compatibility

Designed as an OEM-style fitting for fiberglass ductboard systems with 1.5-inch to 2-inch wall thickness and an 18-inch duct diameter.

Installation Notes

Installation is typically performed by licensed HVAC technicians or sheet metal contractors. Power down the air handler or furnace and confirm the system is de-energized before working on any duct connection. The snaplock collar should be seated fully and sealed with foil-backed tape or mastic per local mechanical code requirements. Follow SMACNA ductboard construction standards and local jurisdiction requirements for all ductwork installations.

Technical Specifications

• Collar Diameter: 18 inches
• Compatible Ductboard Thickness: 1.5 inches to 2 inches

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 122SC-18