In article .net,
DaveC wrote:
Thus spake Charles Spitzer:

don't all compressors already have a drain, unless this is a homebrew job?

no, this one doesn't. Craftsman brand, old.

That sounds very strange. I have an old Craftsman -- horizontal
tank, belt-driven pump, two wheels at one end and a handle at the other.

Between the wheels, on the underside, is the drain valve. It
was rather small -- perhaps 1/4" NPT thread. It had a T-handled valve,
which was hollow for the water to flow out. It was rather prone to jam,
so I replaced it with one with a knurled knob on the end, and a silicone
rubber-gasketed seat on a wider portion on the inside. That one remains
controllable with just my fingers.

If there were room, I would replace it with a timer controlled
solenoid valve, but there is not on this one.

You might consider looking up the parts list for your model on
Sears' website, to see whether it lists a drain valve as part of what it
should have.

I could imagine taking the output fitting and replacing it with
a concentric fitting, with the inner part being a dip tube to drain from
near the bottom, and the outer part passing air to the regulator.

Enjoy,
DoN.
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