Large Compressor Plumbing
I found that Lowes had the best selection and prices
for brass plumbing and compressor accessories. Most of the brass fittings
were found in the plumbing section, rather than the tool corral with the
compressor accessories. The 1/2" cut-off ball-valve came with the compressor,
but I repositioned it.
Starting at factory supplied main brass fitting
coming from the tank that has the gauge, safety-value and pressure-switch.....
there's a brass 1/2" coupling (male-male), 1/2" 90 degree bend (female-female),
1/2" coupling (male-male), the original 1/2" cutoff 300PSI valve, 1/2"
male to 3/8" female reducer, 3/8" coupler (male-male), DeVillbiss filter/regulator,
3/8" male to 1/4" female reducer, 1/4" quick connect compressor fitting.
All brass fittings and teflon tape gave me a zero
PSI drop over 2 weeks with the cutoff valve closed and no noticable leaks
after the cutoff valve. I leave the tank fully charged all the time, but
switch off power, close the air shut-off valve, purge the filter/regulator
and drain the tank of mositure each night.