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For installations where a Packaged Metering Manhole will be located away from vehicle and pedestrian traffic, Openchannelflow offers domed fiberglass tops. These tops are lightweight, structurally strong, and provide excellent operator access.

One of the problems that operators face is trying to meter a line that is located in a street / parking lot / or other vehicle traffic area. While Packaged Metering Manholes provide all-in-one primary device integration with easy operator access in one structure structure, the…

While Packaged Metering Manholes provide a turnkey, drop-in-place solution to below grade flow monitoring, not every budget can bear the cost. Many times, flow measurement has to take place in an existing manhole. However, using an existing manhole means that there are fewer…

For installations where a Packaged Metering Manhole will be subjected to vehicle traffic (AASHTO H-20/HS-20) , formed reducers are necessary to transfer the load to the manhole walls.

One of the greatest benefits of Openchannelflow's fiberglass manholes is corrosion resistance. In a traffic loading configuration, a grade ring / frame / cover set is still required to bring the manhole up to grade. Made out of traditional materials, these items are still…

For years Openchannelflow has offered staff gauges integrated into our flume, weir, and manhole products. Over time, though, we have been asked to expand our offerings to include free-standing Staff (Level) Gauges.

With the advent of the Packaged Metering Manhole (PMM) in the 1960’s, monitoring wastewater discharge compliance by industrial customers became considerably easier. By factory integrating a primary device (usually a flume or weir, but mag meters can also be installed), into a…

The Federal Water Pollution Control Act of 1948 was the first major U.S. law to address water pollution. Growing public awareness and concern for controlling water pollution led to sweeping amendments in 1972. As amended in 1972, the law became commonly known as the Clean Water…

Packaged flow measuring manholes are a drop-in place solution to the need to measure, sample, and characterize the flow of water through a collection system. Flow measurement is commonly done where industries discharge to a POTW's collection system or at critical sections in a…

Recently an industrial customer of Openchannelflow installed one of our fiberglass Packaged Metering Manholes and documented the steps involved in its installation.

One of the most common uses for flumes is to measure the flow of sewage though collection systems. While we may tout the advantages of Packaged Metering Manholes - and they are considerable - the higher initial cost means that when an existing manhole is available, a flume is…

Most fiberglass manholes are installed in locations where neither foot or vehicular traffic is present. For those applications a fiberglass domes top is provided to aid in operator access. But what do you do when the manhole has to be placed where foot traffic will be present?