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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…

One of the oft-mentioned benefits Packaged Metering Manholes is the ability to integrate flumes and other structures that are larger than the manhole barrel diameter, but what exactly does this mean? For below grade applications – typically sanitary sewer mains or…

As we’ve seen before in our comparison of H-flume and Parshall flume manufacturers, not all “equal” products are just that…equal.

Let’s be honest: metering manholes (from an upfront, material cost standpoint) aren’t cheap. While no one would argue that metering manholes don't provide substantial benefit to their users, part of what you are paying for is a unit that is ready for immediate installation…

Fiberglass Packaged Metering Manholes are a great solution to the problem of measuring piped flows below grade and provide a unique set of benefits to consulting engineers who specify them. Accuracy, in this context means, installation accuracy by the contractor and the flow…

Every year at Openchannelflow we talk with several hundred consultants, researchers, contractors and end-users about their flow monitoring needs. Because we work extremely hard at answering all questions "flow” on this web site – and this blog in particular - we are often…

Parshall Flume Metering Manholes are an excellent solution to the problem of how to monitor below-grade piped flows. Integrating the popular Parshall flume into a fiberglass manhole, Parshall Flume Metering Manholes are complete, factory-integrated structures capable of direct…

Fiberglass packaged metering manholes are an innovative solution to the problem of needing to measure piped flow below grade. Packaged metering manholes factory integrate a flow element (usually a flume, but weirs and magnetic flow meters can also be integrated) directly into a…

For years precast concrete manholes have been the default choice in sanitary and storm water applications. Over the years, though, Packaged Fiberglass Manholes have begun to displace concrete manholes for a number of reasons.

The Parshall Flume is the most common type of flume used for monitoring industrial discharges. The ubiquity of the Parshall flume means that it is usually well understood by pretreatment inspectors and industrial users alike – not an insignificant consideration – and is well…

From time to time we like to bring you unusual or innovate approaches that customers use in the field.