Ignoramus13338 fired this volley in
:

Yes, and if they had a dryer, they would not have these problems.

Correct! Then they'd have the problems associated with maintaining the
dryer! (yes, they would! G)

Coalescing filters don't remove enough air, but are cheap to buy and
cheap to operate. Refrigerated filters are damned expensive to buy, but
fairly inexpensive to operate. Calcium chloride absolute filters are
medium cost to buy, but need continual replacements.

An automated drain on the tank, and another on a coalescing filter SIZED
TO YOUR USAGE volumes, is the best combination.

Too small a filter will restrict your flow, and too large a filter won't
cause a large enough adabiatic temperature drop to allow the water to
condense in the filter. THAT's why guys often install water filters
sized to specific individual tools, then install them on the tool's
stinger.

If you can get by draining your cup once a day, a lot of Monday Morning
Valves have built-in coalescing filters which dump upon first application
of air pressure when the lines re-pressurize.

Most filters with a poppet-style drain are made to work that way --
depressureize, and they open -- then apply pressure slowly, and they
drain until the pressure reaches a certain level.

Lloyd