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Many of the flow measurement solutions that Openchannelflow offers are for waters flowing in open channels or non-full pipes. But there are times where full pipe conditions are present. For those times, Openchannelflow has developed fiberglass Mag Meter Manholes.

Factory integrated and easy to install, Mag Meter Manholes allow drop-in place ease in a cost-effective structure. Dig it! Drop it! Done!
Openchannelflow Mag Meter Manholes can integrate meters from all major meter manufacturers, in sizes from 1/2 to 12-inches [1.27 to 30.48 cm].
At the core of each Openchannelflow Fiberglass Mag Meter Manhole is our ASTM D3753 highway rated manhole barrel. The barrel provides high strength and excellent corrosion resistance. To that, we add a cover, base, mounting flange, and, most importantly, a customer supplied mag meter.
Mag Meter Manholes provide:
- Single source responsibility
- Virtually no maintenance
- Minimal downtime (perfect for installation during plant shutdowns)
- A safe environment in which to measure flow
Openchannelflow Mag Meter Manholes can be configured to your site needs, with a variety of top styles available:
- 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)
The manholes are also available in diameters from 48 to 96-inches [1.22 to 2.44 m] and in depths up to 35-feet [10.7 m] and with a variety of accessories:
- Integral flow benches
- Grating platforms
- Ventilation
- Equipment mounting
- Two-piece construction (for oversized manholes)
- Isolation valves
MAG meter manhole components
- Cover
- OSHA-complaint fiberglass ladder
- Thru-wall coupling
- Integral base / mounting flange
- Integrated mag meter / ground rings / gaskets (customer supplied)
- Inlet / outlet piping
LOCATIONS IN ATLANTA, GA & BOISE, ID