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  • Why GSI
  • Products
  • Where to Buy
  • News
  • Resources
  • Contact
Products

    Duct Collars

    GSI’s most cost-effective factory sealed fitting for beginning a new duct run from the trunk line. Available in three installation styles and multiple lengths to suit virtually every installation need or budget. Yellow Union Label manufacturing is standard on these products.

  • duct collars; starting collars; hvac collars; spin in collars; tabbed duct collar

    6″ Long Press-on Collar

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  • duct collars; starting collars; hvac collars; spin in collars; tabbed duct collar

    3″ Long Tabbed Collar

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  • duct collars; starting collars; hvac collars; spin in collars; tabbed duct collar

    6″ Long Tabbed Start Collar

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  • duct collars; starting collars; hvac collars; spin in collars; tabbed duct collar

    3″ Long Spin-in Collar

    Read more
  • duct collars; starting collars; hvac collars; spin in collars; tabbed duct collar

    6″ Long Spin-in Collar

    Read more
  • Products Overview
  • HVAC Pipe
    • GreenSeam® Plus Snap-Lock Pipe
    • Reeves Lock Pipe
  • HETO High Efficiency Take Offs
    • Tapered High Efficiency Takeoff
    • Straight-Sided High Efficiency Takeoff
    • Center High Efficiency Takeoff
  • Conicals
    • Press On Conical
    • Spin In Conical
  • Saddle Taps
    • Saddle Tap
  • Duct Collars
    • 6″ Long Press-on Collar
    • 3″ Long Tabbed Collar
    • 6″ Long Tabbed Start Collar
    • 3″ Long Spin-in Collar
    • 6″ Long Spin-in Collar
  • Couplers
    • 6″ Long Coupler
    • 8″ Long Coupler
  • In-Line Sleeve Dampers
    • 6″ In-Line Sleeve Damper
  • Tee-Joints
    • Free Flow Tee Joint
  • Adjustable Pipe Elbows
    • 90° Adjustable Elbow
    • 45° Adjustable Elbow
  • Reducers and End Caps
    • Reducers
    • End Caps

Corporate Office

210 Fifth Street
Charleroi, PA 15022

Phone: (866) 285 5222

Fax: (724) 258 5494

Contact Us

Manufacturing Locations

1502 Industrial Drive
E. Monongahela, PA 15063

Phone: (724) 258 0500

300 SE 15th Street
Wagoner, OK 74467

Phone: (918) 485 1700

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