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

    Reducers and End Caps

    The perfect accessories for any low-pressure duct system. GSI reducers and end caps are factory sealed and require no external sealing when paired with GreenSeam Plus pipe. Yellow Union Label manufacturing is standard on these products.

  • Reducers

    Reducers

  • End Caps

    End Caps

  • Products Overview
  • HVAC Snap-Lock Pipe
    • Factory-Sealed Snap-Lock Pipe – GreenSeam Plus
    • 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
    • HVAC 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
  • Duct Run Couplers
    • 6″ Long Coupler
    • 8″ Long Coupler
  • In-Line Sleeve Dampers
    • 6″ In-Line Sleeve Damper
  • Duct Tee-Joints
    • Free Flow Tee Joint
  • Adjustable HVAC 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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