I can usually fire a full strip of 18 ga. brads from a fully
pressurized (125 psi) 5 gallon tank. The pancake compressor or any
compressor will fill the tank just fine, the only difference would be
in how long it takes to do so. When filling at a service station, they
may have the pressure at the hose available to customers for filling
tires regulated to lower than the maximum available.
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Larry Wasserman Baltimore, Maryland