"Brent" wrote in message
...


the tire shop does not likely run the tools at 150PSI but if the shop
has or had air lifts or air tire changers they might be operating at
150psi. at the tool ports there is likely a secondary regulator to
drop it down to 90 or thereaboutsbut the entire shop can be run off of
the single two stage beast and the branch line for the tools is
regulated down further than the primary machines

Don't bet on that!
I worked at a shop years back and all the air was at 175 PSI. You had a
tough time even connecting a standard QD. You sure did not want to get your
hand stuck between the handle of an air ratchet and the engine block!
Greg