Openchannelflow products

Openchannelflow fiberglass Packaged Metering Manholes (PMMs) solve the difficult problem of how to measure piped flows below grade.  Starting with our industry leading fiberglass manhole tube, Openchannelflow integrates a flow device, cover, base, and access ladder. The result is a single-piece, watertight, and corrosion-resistant structure from which operators can accurately (and safely) measure and sample flows.

For a Flume or Weir to work correctly, the flow must be sub-critical and tranquil.  Many times, however, site conditions don’t allow the development of this type of flow.  For those occasions, Openchannelflow has developed fiberglass Energy Absorbing Manholes. Fiberglass Energy Absorbing Manholes are a way to slow the velocity of water through a pipe system in a way that`s cost-effective and which requires little in the way of line downtime. Energy Absorbing Manholes can be placed directly upstream of Packaged Metering Manholes. The flow is slowed and conditioned in the Energy Absorbing Manhole and then smoothly flows into the Packaged Metering Manhole to be measured. Energy Absorbing Manholes eliminate the need for costly line excavations, replacement, or resloping.  Installation can also be concurrent with a Packaged Metering Manhole – reducing labor and machinery costs.

Openchannelflow fiberglass Diversion Manholes help operators control, direct, and distribute below-grade non-full pipe flows. Diversion Manholes are available in multiple configurations, including: Interior drops, Y-channels, J-bends. Diversion Manholes allow for drop-in-place installation and can be provided with gated channels to direct flow to different downstream locations. Like our other fiberglass manholes, Openchannelflow Diversion Manholes are single-piece, watertight, and corrosion-resistant. When Y-channels or J-bends are provided, fiberglass benching is included around them. The benching eliminates the need to pour concrete benching in the manhole and has a molded-in non-slip diamond plate pattern. The diamond plate doesn`t wear or blind like gritted surfaces and is easy to maintain.

Storm Water / Screening Manholes are a class of structures that Openchannelflow has developed to removed trash, grit, floating debris, and oil from collection systems.  Using our proven fiberglass manhole tubes, Openchannelflow integrates a screenings structure specific to your site`s needs. Just like our other fiberglass manholes, Openchannelflow Storm Water / Screenings Manholes are single-piece, watertight, and corrosion resistant.  Factory integrated they are cost effective and require little line downtime. Dig it! Drop it! Done!

For a drop-in-place solution to the problem of how to perform inline sewage grinding, Openchannelflow offers factory-integrated fiberglass Grinder Manholes.   These manholes take our tried-and-true fiberglass manhole structure and integrates a custom channel to mount your grinder.  Fiberglass Grinder Manholes are rugged, corrosion-resistant, and cost-effective, providing factory integration and little in the way of line downtime or manhole maintenance.