Of the four low pressure gauges, three were bumped. I hooked up an extra gauge to output of the fourth that was not bumped/bent. Both gauges were measuring the same, so that fourth gauge and the testing gauge should be fine. When I went to hook up the testing gauge to the three bent gauges though they were definitely off. They did not read anywhere close to what the test gauge was reading. So long story short, yes the three gauges I'm worried about are not reading correctly.
So, is there a way to calibrate them using this test gauge on the output, or are they pretty much shot?
I just hate to replace them since they are brand new, but then again for $20 is it really worth my time to try to re-calibrate these things.