Product/Service

Fiberglass Packaged Metering Manhole

Built to meet the requirements of ANSI/ASTM D-3753 "Standard specifications for fiber-reinforced manholes
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Built to meet the requirements of ANSI/ASTM D-3753 "Standard specifications for fiber-reinforced manholes."

  • Integral Parshall or other flume for flow measurement
  • Top cover or manhole reducer
  • End adapters for quick connection to pipe
  • Internal ladder
  • Mounting brackets for flow sensors and other monitoring equipment

A complete packaged metering manhole designed for easy installation to solve your flow measuring requirements in one clean package. Another first in design from Plasti-Fab, the specialist in flume flow measurement innovation.

Choice of Cover

  • Light weight 48" diameter hinged fiberglass cover with hasp for locking.
  • Concentric 24" 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 nontraffic loads.

Fiberglass Barrel

  • 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 - built to meet structural requirements of ASTM D-3753 and very durable.
  • Smooth - super smooth interior provides a clean non-abrasive working place inside the manhole.

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 requirements such as sampling, pH, conductivity and temperature.

Convenient Features and Accessories

  • FRP ladder is provided on units over 4 ft. Deep.
  • Top of flume may be covered with FRP grating or cover (optional).
  • Shelf, bracket or hook for mounting flow meter or other equipment may be provided (optional).
  • Utility taps for convenient sub-grade hook-ups, or above grade enclosures for meters and samplers are available (optional).
  • Vents, safety straps and other OSHA safety devices (optional depending on manhole depth).

End Adapters For Pipe

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

Cost Saving to Install

One piece construction combined with light weight and simple connection to pipe results in less cost to install.

Manufacturing

Plasti-Fab Packaged Metering Manhole is constructed completely from fiberglass reinforced plastic (FRP). An FRP Parshall, or other type flume, is incorporated into an FRP manhole. In addition, the Packaged Metering Manhole has an FRP bottom which provides a sealed watertight package. An FRP ladder is provided on units over 4 feet in depth. The result is a complete Packaged Metering Manhole structure that incorporates the field proven integrity of FRP manholes with the years of flume and fiberglass technology of Plasti-Fab.

PlastiFab, Inc., 9665 Southwest Tualatin, P.O. Box 100, Tualatin, OR 97062. Tel: 503-692-5460; Fax: 503-692-1145.