Forward flow testing of a backflow preventer
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YouTubeMICHIGAN CODE TRAINING
Forward flow testing of a backflow preventer
Using the wrong gage, note the scale is 0 to150 psi. When reading flows with pitot tubes, the target pressure should be somewhere near the center 1/3 of the Guage. This one was 6 inch discharge which we were only needing a reading of 2 psi and the gage only read 3 psi, not accurate enough. The test was to be performed using a 0 to 15 lb gage ...
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