Flumes
By far the most widely accepted flow measurement device is a flume. With over 40 years experience assisting customers with selecting the appropriate flume for their applications paired with Plasti-Fab, Inc.’s high quality corrosion resistant flumes, let C.C. Lynch & Associates, Inc. help you design your next flow measurement system.
Palmer-Bowlus Flume >>

Widely used for flow measurement in manholes and temporary flow studies due to it’s small size and ability to install in existing sewer lines.
Available in sizes 4” to 72” covering flow ranges from 2-80 GPM and 600-91,000 GPM, respectively.
Trapezoidal Flume >>

Covering a wide range of flows these flumes were originally designed for use irrigation canals. The sloped sidewalls provide great resolution for applications with significant variance between low and high flow rates.
Available sizes cover flow ranges from 1-30 GPM up to 320-21,970 GPM.
Parshall Flume >>

The most widely used flume for flow measurement. Available in sizes 1 inch through 12 feet covering flow ranges from 2-90 GPM up to 3,060-255,000 GPM, respectively.
Available as a nested flume to accommodate facility expansions.
Magic Bottoms available to correct a submerged flume condition.
H-Flumes >>

Requiring free fall from the end of the flume the H, HS, and HL flumes are fantastic flumes for applications with significant variance between low and high flow rates.
Available in sizes 0.4’ to 4’ covering flow ranges from 1-30 GPM up to 10, 38,550 GPM, respectively.
Packaged Metering Manhole >>

Introduced by Plasti-Fab over 20 years ago, a PMM is the easiest way to properly install a flume in an underground pipe. Integral flume with smooth non-porous bacteria resistant manhole interior. Available with flip top or traffic rated manhole cover. The highest quality PMM available on the market.
