I only fill guns, a 3-5 minute session, at some point, after a minute, or so, I open each of the system's three pressure release screws, one at a time, in no particular order, for a quick second, just to expel moisture.
Much worse starting compressor under pressure than stopping it, in fact, using the pictured "deadhead" adapter in the fill whip, I pressurize system, shut down then use spray bottle of soapy water to check for leaks. Of course, I release pressure, after leak test, so no chance of damage re-starting under pressure.
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