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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…

Can a new flume be installed in an existing Packaged Metering Manhole? Maybe. There are a number of factors to consider: manhole barrel diameter, manhole top style, existing flume style / size, and desired flume style / size.

The old adage of taking measuring twice and cutting once has never been so appropriate as it is when determining the depth of a fiberglass manhole. Although fiberglass manholes (FRP) posses a wealth of benefits; modularity is not one of them. Because all of the elements are…

Fiberglass Diversion Manholes are way of controlling open channel flows in a factory integrated design. Utilizing the core design of our standard fiberglass manholes, Diversion Manholes provide corrosion resistance, speed of installation, and ease of use. A variety of flow…