Air leak from pressure switch

by ken
(california)

Hi I just purchased a used pro air II compressor 5hp 26 gallons tank. I noticed the air leaking from the pressure switch area. This is my first air compressor. But when the pressure dropped down to 35-45 psi. seem it hold air. and tips on setting cut in and out pressure.
thanks

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Bill says...

The air that is leaking out from or around your pressure switch is a symptom of a check valve leak.

More information on why pressure switches seem to leak on this page.

Cheers,

Bill