my water pressure gauge seemed off so I wanted to test it out. I set my air compressor at 25psi and made an attachment with tubing to my gauge. Blew 25psi of air and it read 20psi on the gauge (picture attached). Would this be an accurate test or should I test it a different way?
This is one of the old prism gauges so I’m sure they are far an in between, is there a direct replacement? Looked some up and saw that some are not rated for 3.0 litters from 98 and up, why is that?
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