12 x 3 Ball Catcher Instructions 2023 03 08.pdf – Personal – Microsoft Edge 3_18_2023 9_10_35 PM

A glassy smooth surface in a flowing river indicates unobstructed laminar flow. An invisible obstruction, a rock or a branch just below the surface, will induce a ripple on the water’s surface in the shape of a vee that points upstream. Our goal is to help you find trouble spots by identifying those upstream vees hidden in your pipeline.

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