Onboard Air Anatomy - Air Free
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The pressure gauge is kind of an optional part, but without it, there is no way to really see what is going on in the system. While the liquid filled gauge is about double the price, there are some advantages. As the compressor pumps, there are pulses and they can be reflected in as much as +/-25 psi increments on the gauge. Not only does the bouncing make it harder to read, but it can greatly lessen the life span of the gauge. View Related Article
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