Southwark Metal 11002512 Straight Collar 25x12

Product Description

The SOUTHWARK METAL 11002512 is a straight collar fitting used in sheet metal ductwork fabrication and HVAC air distribution systems. Straight collars serve as the transition point between trunk duct and branch takeoffs, or as an inline joining sleeve between duct sections. This unit is sized at 25 x 12 inches, making it suited for larger rectangular duct runs common in commercial and light commercial HVAC installations. Sheet metal fabricators, HVAC installers, and ductwork contractors work with this type of fitting during both new construction and retrofit projects where maintaining a direct, unobstructed duct path is required.

The 11002512 straight collar is appropriate for rectangular duct systems where a flush, straight connection is needed without angular offset. Its 25 x 12 inch profile fits standard trunk duct sizing used in forced-air heating and cooling distribution. This fitting is typically installed during the rough-in phase of mechanical work and may be used in residential, light commercial, or commercial duct assemblies depending on system design.

Key Features

• Straight collar configuration maintains unobstructed airflow path through the duct connection
• 25 x 12 inch size fits standard rectangular duct trunk dimensions
• Sold as a single unit for targeted replacement or new installation use
• Designed for integration into sheet metal ductwork systems

Compatibility

Designed as an OEM-style replacement or new-install fitting for rectangular sheet metal duct systems requiring a straight collar at a 25 x 12 inch cross-section.

Installation Notes

Installation of sheet metal duct collars is typically performed by licensed HVAC technicians or sheet metal contractors in accordance with SMACNA ductwork standards and local mechanical codes. The air handling system should be fully powered down and the blower confirmed off before fitting any duct components. Seal all joints with UL-listed duct sealant or approved metal tape per applicable code requirements. Avoid over-crimping the collar edges, as deformation can compromise the fit and increase air leakage at the connection.