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  • Why GSI
  • Products
  • Where to Buy
  • News
  • Resources
  • Contact
Products
  • HVAC Snap-Lock Pipe

    GSI's snap-lock pipe is an easy-to-use, easy-to-ship, ductwork solution for the low-pressure side of an HVAC system.  Available with or without our patented GreenSeam® factory sealed technology.  Yellow Union Label manufacturing is standard on these products.

  • HETO High Efficiency Take Offs

    GSI’s most versatile factory sealed fittings, combining efficient use of space and optimal airflow. Our HETOS are available in three styles to suit virtually every installation need. Yellow Union Label manufacturing is standard on these products.

  • Conicals

    GSI’s traditional factory sealed round tapered take-off with a large base creating less static and total pressure drop than other fittings. Our Conicals are available in two installation styles, spin-in and press-on. Yellow Union Label manufacturing is standard on these products.

  • Duct Collars

    GSI’s most cost-effective factory sealed fittings for beginning a new duct run from the trunk line. This HVAC duct collar product line is available in three installation styles, including press-on collars, tabbed collars, and spin-in collars, as well as multiple lengths (3" and 6") to suit virtually every installation need or budget. Yellow Union Label manufacturing is standard on these duct collar products.

  • Duct Run Couplers

    Duct run couplers are designed to join two straight duct runs together. GSI duct run couplers are factory-sealed, meaning no external sealant is required at the connection.  Our couplers are available in two sizes, 6" and 8", to accommodate multiple installation needs. Yellow Union Label manufacturing is standard on these coupler products.

  • In-Line Sleeve Dampers

    When additional air balancing is required, GSI’s in-line sleeve damper has been specifically engineered to work with our GreenSeam Plus pipe. The in-line damper provides the best way to keep the system factory sealed and add supplemental system air balancing. Yellow Union Label manufacturing is standard on these products.

  • Duct Tee-Joints

    Duct tee-joints are designed to branch a single duct run into two at a 90-degree angle. GSI duct tee-joints are available in two variations, factory-sealed and unsealed. Yellow Union Label manufacturing is standard on these tee joint products.

  • Adjustable HVAC Pipe Elbows

    Adjustable HVAC pipe elbows, also known as duct elbows, are the most efficient way turn a straight run of duct. GreenSeam pipe elbows are available in two styles, 45 and 90 degree to accommodate multiple installation needs. Yellow Union Label manufacturing is standard on these products.

  • Saddle Taps

    GSI’s factory sealed take-off for round duct. Manufactured with a curved one-inch flange and peel and stick gasket, our saddle tap installs easily on round duct without the need for external sealing. Yellow Union Label manufacturing is standard on these 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.

  • 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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