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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?

Industries measure their discharges either to meet their NPDES permit or because of municipal / county requirement. For industrial operators charged with monitoring their process discharges, a Packaged Metering Manhole can be a cost effective solution to their flow measurement…

At flow monitoring stations where a Packaged Metering Manhole is used to measure / sample a flow stream, the flow monitoring and sampling equipment is usually housed either in a dedicated equipment shelter or in a nearby building. There are times, however, when neither option is…

Those responsible for collecting and reporting industrial pretreatment discharge information (typically flow, pH, BOD, and temperature) are rarely dedicated professionals. Almost always, environmental discharge monitoring is just one of a laundry list of job duties they have to…

To help the growing list of operators of our fiberglass Packaged Metering Manholes maintain their investments, Openchannelflow has put together an inspection form to standardize the collection and reporting of data useful in establishing maintenance cycles for Packaged Metering…

Packaged Metering Manholes factory integrate a flow measurement flume / weir into a fiberglass manhole to provide a complete, turn-key solution to monitor industrial and municipal flows. Openchannelflow Packaged Metering Manholes come complete and ready for immediate…

Packaged Metering Manholes from Openchannelflow are available with a wide range of options to help customize them to your particular application needs. A key element of this customization is the variety of top styles available, with each top specially engineer for a site’s…

Flow Sampling Manholes are specialized manholes designed for:

In its simplest form a Packaged Metering Manhole (PMM) consists of a primary device (typically a flume or weir) molded into a fiberglass (FRP) manhole. By directly factory integrating the primary device, a single-piece, drop in-place flow monitoring solution is created.

For applications where the depth of a Packaged Fiberglass Manhole has been undersized, Openchannelflow offers Manhole Extensions. These Extensions are designed to provide standardized solution integrating the height modification, top, and ladder into a single drop-in-place piece.

One of the problems contractors often face when installing a flume in a concrete manhole is forming the transitions into / out of the flume. Done poorly and the result is a flume that either experiences turbulence or submergence – both which will seriously compromise the…