Industrial-grade galvanized steel couplings — precision die-stamped for seamless duct alignment and airtight connections across 3″ to 20″ diameters. Built for high-pressure HVAC environments that demand zero compromise.
SIDCO couplings are manufactured using 22-gauge G60 galvanized or Paintgrip steel to deliver unmatched structural integrity in commercial and industrial HVAC systems. Each coupling is precision-formed to ensure seamless duct alignment and a pressure-tight seal that holds under vibration, temperature swings, and sustained airflow.
Engineered to exact SMACNA standards — dimensional accuracy guaranteed across every diameter in our lineup.
22-gauge G60 galvanized or Paintgrip steel, die-stamped or roll-formed for consistent wall thickness and rigidity.
Every coupling is dimensionally and fitment-checked before leaving our Memphis facility. No compromises.
Stocked in Memphis, TN for rapid fulfillment. Order online or by phone — delivered when you need it.
Connecting spiral duct runs in offices, retail spaces, and multi-tenant buildings where airtight distribution is critical.
Rated for high-pressure airflow, vibration, and thermal cycling in manufacturing, warehousing, and process ventilation.
The contractor's choice for new builds — code-compliant, precisely-fit, and built to last for the building's lifetime.
Extend or repair existing spiral duct systems with couplings compatible with standard diameter increments.
Handles condensation, pressure differentials, and sustained operation demands of commercial cooling systems.
Consistent fitment quality in both supply and return/exhaust systems, regardless of airflow direction or velocity.
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