Southwark Metal SC14 Spiral Coupling 14 Inches

Product Description

The SOUTHWARK METAL SC14 is a 14-inch spiral coupling designed for joining sections of spiral duct in commercial and residential HVAC air distribution systems. This fitting creates a secure, low-leak connection between spiral pipe runs, maintaining system pressure and airflow integrity. HVAC sheet metal mechanics and ductwork installers use this coupling during new construction and retrofit projects where spiral duct is the specified distribution method. The 14-inch diameter makes it suited for medium to large trunk line connections in commercial HVAC layouts.

The SC14 is used in forced-air ventilation and HVAC duct systems where spiral pipe is the chosen distribution medium. It is appropriate for both supply and return air applications in commercial buildings, industrial facilities, and larger residential systems. Installers working with spiral duct runs will use this coupling at pipe-to-pipe junctions to maintain continuous, round cross-section airflow paths without transitioning to rectangular duct fittings.

Key Features

• 14-inch diameter fits standard 14-inch spiral duct pipe
• Coupling design allows quick, inline joining of two spiral duct sections
• Maintains round cross-section for consistent airflow and low system resistance
• Appropriate for both supply and return air duct applications

Compatibility

Designed as an OEM-style replacement or new-installation fitting for standard 14-inch diameter spiral duct pipe systems.

Installation Notes

Installation should be performed by a licensed sheet metal mechanic or HVAC technician in accordance with SMACNA duct construction standards and applicable local mechanical codes. Power down the air handling unit and verify the system is de-pressurized before cutting into or modifying existing ductwork. Secure the coupling with sheet metal screws at the required spacing per SMACNA guidelines, then seal all joints with UL 181-listed mastic or approved foil tape to meet leakage class requirements.