A venturi flow meter is installed in a piped water system with specific straight pipe distances required upstream and downstream to ensure a valid pressure drop reading. The upstream pipe length requires a minimum of seven pipe diameters, while the downstream pipe length requires a minimum of four pipe diameters. The venturi device is positioned to allow unobstructed access to the read-out hose attachment, and the direction of water flow is maintained along the pipeline.
7 PIPE DIA. MIN. FOR VALID PRESSURE DROP READING STRAIGHT PIPE DISTANCE REQUIRED DIA. MIN 4 PIPE DIRECTION OF WATER FLOW VENTURI, INSTALL TO ALLOW UNOBSTRUCTED ACCESS TO READ-OUT HOSE ATTACHMENT
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