• Parshall Flumes
  • Parshall Flumes - 2
  • Parshall Flumes - 3
  • Parshall Flumes - 4
  • Parshall Flumes - 5 (Description: A fiber reinforced plastic flume in a metering manhole)
  • Parshall Flumes - 6 (Description: The Parshall Flume was built to capture the snow melt flow in the spring. It is there to understand the watershed effect of the flow and the volume expected.)
  • Parshall Flumes - 7 (Description: Custom Enduro Model 200 with Parshall Flume Metering System-This enclosure can be customized to meet any flow conditions and can feature any type of flume.)
Parshall Flumes are used in sewage treatment plants as well as industrial and municipal sewers. When it comes to fixed flow monitoring installations, the Parshall Flume is one of the most widely-used flume types. The special shaped open channel flow section is often installed in ditches or canals to measure flow rate.

Parshall Flumes are sized by throat width and conform to standardized dimensions published in the U.S. Department of the Interior, Bureau of Reclamation.
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Item #

Item Name

Throat Width

Minimum Flow Range

Maximum Flow Range

N/A 1 Inch (in) Throat Width Parshall Flume N/A 1 in N/A N/A
N/A 2 Inch (in) Throat Width Parshall Flume N/A 2 in N/A N/A
N/A 3 Inch (in) Throat Width Parshall Flume N/A 3 in N/A 12.6 gpm N/A 835 gpm
N/A 6 Inch (in) Throat Width Parshall Flume N/A 6 in N/A 24.2 gpm N/A 1750 gpm
N/A 9 Inch (in) Throat Width Parshall Flume N/A 9 in N/A 40.8 gpm N/A 3980 gpm
N/A 12 Inch (in) Throat Width Parshall Flume N/A 12 in N/A 53.9 gpm N/A 7220 gpm
N/A 18 Inch (in) Throat Width Parshall Flume N/A 18 in N/A 78.1 gpm N/A 11000 gpm
N/A 24 Inch (in) Throat Width Parshall Flume N/A 24 in N/A 190 gpm N/A 14900 gpm
N/A 30 Inch (in) Throat Width Parshall Flume N/A 30 in N/A N/A
N/A 36 Inch (in) Throat Width Parshall Flume N/A 36 in N/A 276 gpm N/A 22600 gpm
N/A 48 Inch (in) Throat Width Parshall Flume N/A 48 in N/A 565 gpm N/A 30500 gpm
N/A 60 Inch (in) Throat Width Parshall Flume N/A 60 in N/A 696 gpm N/A 38400 gpm
N/A 72 Inch (in) Throat Width Parshall Flume N/A 72 in N/A N/A
N/A 84 Inch (in) Throat Width Parshall Flume N/A 84 in N/A N/A
N/A 96 Inch (in) Throat Width Parshall Flume N/A 96 in N/A 1180 gpm N/A 46200 gpm
N/A 120 Inch (in) Throat Width Parshall Flume N/A 120 in N/A 2580 gpm N/A 131000 gpm
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