Quality Fiberglass Shelters, Flumes, Metering Manholes & Custom Products

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Manholes are manufactured as a total flow monitoring solution. The metering manholes may be supplied with any type of flume or flow measurement weir integral to the structure.

The strong one-piece design assures that the manhole will never leak, eliminating infiltration at the site. Fiberglass manholes weigh only a fraction of the weight of pre-cast manholes, allowing for quick and easy installation with less equipment and labor. Fiberglass construction ensures that corrosive liquids and gases will not cause structural problems, enabling the manhole to serve a long, maintenance-free life. Their compact and lightweight design makes them ideal for both industrial and municipal applications.

Manholes are offered in two sizes, 48 inch or 60 inch diameters. Each size can be configured with a either a hinged fiberglass cover or a H-2O adapter cover for installation in a traffic areas. Both styles of covers are completely leak free and meet equivalent load ratings as those of the manhole body.

48" Metering Manhole Systems start at...$3,300.00
60" Metering Manhole Systems start at...$4,200.00

60 inch Metering Manhole with Parshall Flume

60 inch Metering Manhole with Parshall Flume

60 inch Metering Manhole

Constructed from a strong one-piece FRP design, this manhole will never leak eliminating infiltration.  Measuring 48" wide and 10.5' deep, this metering manhole arrives at the job site ready for installation.

When compared to pre cast concrete, fiberglass manholes are lightweight and easier to handle, allowing for a quicker installation.

Installation is simple with only the pipe connections to complete using supplied neoprene pipe couplers.

Concrete is poured at the base of the manhole and leveled to the top of this 3" Parshall flume to eliminate deflection allowing for accurate flow measurement.

Ultra sonic bracket for the flow meter and fiberglass access ladder shown inside the metering manhole.

Lightweight hinged cover allows easy access to the manhole. H-20 covers are also available.