Plasti-Fab Fiberglass Packaged Metering Manholes

The Plasti-Fab Packaged Metering Manhole was an industry first and remains the most complete and easy-to-install flow measurement package on the market. The full range of flumes may be integrally molded into the composite manhole, along with inlet and outlet adapters, pipe stubs, and monitoring accessories for a complete package.

The composite manhole interior is a premium grade marine white gel coat that provides a smooth non-porous surface to resist bacteria for a cleaner environment, and to maximize illumination for a safer workspace. All hardware is heavy-duty stainless steel. Anchor tabs are mechanically fastened to the barrel to ensure a secure installation.

Built to meet the requirements of ANSI/ASTM D-3753 "Standard specifications for fiber-reinforced manholes." Packaged Metering Manholes have the following features: Integral Parshall or other flume for flow measurement, top cover or manhole reducer, end adapters for quick connection to pipe, internal ladder, and concentric 24" diameter reducer with aluminum watertight (gas tight) lid for non-traffic loads.

Features

• Light weight 48" or 60" diameter hinged fiberglass cover with hasp for locking.
• Concentric 24" or 30" diameter manway reducer for use with steel cover suitable for H-20 highway loading.
• Concentric 24" diameter reducer with aluminum watertight (gas tight) lid for non-traffic loads.

• 48", 60" or 72" diameter barrels are standard, however other sizes are available as necessary
• Watertight - one piece construction with FRP bottom completely seals manhole and eliminates infiltration
• Lightweight - weighs less than 10% of a comparable concrete structure to permit fast easy installation
• Corrosion resistant - extremely resistant to numerous chemicals, salt water, corrosive soil conditions, ground water and electrolysis
• Strong and very durable - built to meet structural requirements of ASTM D-3753
• Smooth white interior gel coat finish provides a clean, bright work space inside the manhole

• FRP ladder is provided on units over 4 ft. Deep.
• Top of flume may be covered with FRP grating.
• Shelf, bracket or hook for mounting flow meter, or other equipment may be provided.
• Utility taps for convenient sub-grade hook-ups, or above grade enclosures for meters and samplers are available.
• Vents, safety rail, harness and other OSHA safety devices can be factory installed.

Self Contained Flow Measurement and Monitoring Capability

• Normally supplied with an integral FRP Parshall or Palmer-Bowlus flume. Other flumes and flow devices may be used including Cutthroat, Trapezoidal, H-flumes, Weirs or closed pipe meters.
• Mounting brackets or sensor cavities are available for all types of flow meters and other monitoring equipment such as sampling, pH, conductivity and temperature.

End Adapters For Pipe

FRP pipe stubs with flexible water-tight neoprene connecting boots are provided. Neoprene boot is attached with stainless steel clamping bands to provide an easy to install connection.

Cost Saving to Install

One piece construction assures that the flume and flow monitoring package are set up correctly. The light weight fiberglass manhole with simple pipe connection helps to reduce the time and cost of installation.

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