For contractors, Packaged Metering Manholes provide:

• Single source responsibility
• No finger-pointing among subs
• Confidence that the primary device is installed correctly
• No expensive call-backs
• Virtually no warranty repairs. Dig a hole, drop it in, and you're done!
• Minimal installation downtime
• Industry-leading (5) year FiberLock warranty - install it and forget it!

For consultants, Packaged Metering Manholes provide:

• Single source responsibility
• No finger point among subs
• Wide variety of styles and sizes of primary devices
• Choose the device that best fits your flow rates
• Confidence that the primary device is installed correctly
• Accurate flow measurement
• No callbacks
• High levels of user satisfaction!
• Industry-leading (5) year FiberLock warranty - install it and forget it!

Openchannelflow Packaged Metering Manholes can include different flow devices to measure both open and closed pipe flows.  

• Flumes  
• Weirs  
• Mag Meters  
• Venturi tubes

At the core of each Openchannelflow Packaged Metering Manhole is our fiberglass manhole tube.  While manhole configurations may differ, all Openchannelflow manhole tubes meet or exceed both ASTM D3753 and AASHTO H-20 standards.  The interior of these tubes is smooth and corrosion-resistant.  The light tan coloration of the tube helps to maximize visibility inside the manhole.

Unlike competing Packaged Metering Manholes, which claim to meet ASTM D3753, the interior of Openchannelflow Packaged Metering Manholes are pigment / gel coat free – allowing for visual inspection and quality control of the tube during and after production and meeting the requirements of D3753.

A variety of top styles are available with Openchannelflow Packaged Metering Manholes, including:

• Domed Fiberglass (for non-vehicle / traffic areas)
• Aluminum Covers (for pedestrian traffic areas)
• H-20 Traffic Reducers (for use with standard grade rings, frames, and covers)

• Open Top (for custom applications where the manhole top needs to be open or provided with a fiberglass grating)

Openchannelflow Packaged Metering Manholes are available in diameters from 48 to 96-inches [1.22 to 2.44 m] and in depths up to 35-feet [10.7 m].

packaged metering manhole components

• Cover
• OSHA-complaint fiberglass ladder
• Thru-wall coupling
• Integral base / mounting flange
• Flow device (flume, weir, etc.)
• Inlet / outlet piping

As always, Openchannelflow has developed a range of accessories for our Packaged Metering Manholes, including:

• Integral flow benches
• Grating platforms
• Ventilation 
• Equipment mounting
• Two-piece construction (for oversized manholes)