OCF Fiberglass Manholes

Openchannelflow Fiberglass Manholes are a cost-effective solution to the need to measure or control piped flows below grade.

Openchannelflow offers a variety of different configurations to solve a variety of needs:

• Packaged Metering Manholes (PMMs)
  • ​For measurement and sampling of full and non-full pipe flows
  • PMMs can integrate Flumes, Weirs, or Mag Meters
• Grinder Manholes
  • ​Integrating open channel grinders
• Energy Absorbing Manholes
  • ​For slowing and conditioning high velocity flows
• Storm Water / Screenings Manholes
  • ​For the removal of debris, oil, and other contaminants from a collection system
• Diversion Manholes
  • ​For the controlling, directing, and distributing below-grade non-full pipe flows

Where corrosion is a concern and a standard concrete manhole won’t due, Openchannelflow flow also offers standard flow through manholes.  These manholes can have pipe stubs for inline connection, or they can be provided as a drop-over “dog house” to go over the line.  Either style utilizes the same high strength / corrosion-resistant design!

At the core of each Openchannelflow Fiberglass Manhole is our ASTM D3753 highway rated manhole barrel.  The barrel is lightweight and yet still provides high strength, as well as excellent corrosion resistance.

Once integrated into one of our manhole structures above, the resultant unit is lightweight, watertight, easy to install, and requires virtually no maintenance.

Dig it!  Drop it! Done!