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Fiberglass Products - ISI Sales

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We provide solutions to open channel flow problems for customers throughout the U.S. and around the world. Our fiberglass-reinforced plastics (FRP) are engineered for a wide range of corrosive and abusive environments and are intended to save our customers both time and money.



  • Shelters
  • Panel/Sun Shades
  • Control Panel Consoles
  • Enclosures
  • Flumes
  • Package Metering Manholes
  • Weir Boxes

Contact a Dedicated ISI Representative

ISI has developed an extensive product offering through partnerships with industry leading manufacturers. With extensive experience in instrumentation applications, count on us to meet your needs while improving your facility’s operation and efficiency.