How long do your units take to get to 4500psi (or whatever pressure you test it at) using the dead head test? I'd like to have something to compare mine to.
IF you're testing just the pressure at end of whip coming from compressor (no filtering devices other than the small "cotton" filter housing that came with YH), mine takes 5-10 seconds at most. If I dead head test at end AFTER my two filters, about 20 seconds.
I deadhead lines and both filters, the coalescent and secondary media sieve filter. I let it sit for 5 minutes or so. One small leak can ruin your day, no? I worked for Taylor Diving so also a bit anal on gauge accuracy ):