I just received a 15 PSIG pressure gauge (China) from ebay. I'm going to use it to monitor the pressure when I pressurize the fuel tank to look for leaks (soapy water method). This test is done at 2 PSIG or less. Knowing the reliability of pressure gauges in general, I checked it's accuracy before using it. The needle didn't move off the peg until 4.5 PSI!! It read 2 PSI with 6.5 PSI was applied. That would likely have damaged my fuel tank. So, a word to the wise: bourdon tube pressure gauges are OFTEN way out of tolerance from the factory. I have found this to be true for both those of US and China origin. Fortunately, repositioning the needle put mine on the money.
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