Auto drain valves for compressors

[DesertCat]

I'll never get one.

Years ago when I ran a body shop my first order of business was to unlock the yard and building and get the compressors running. Both compressors had a simple 1/4 turn ball valve to drain which I opened at the end of the day and closed in the morning after checking the oil level.

Made for a lifetime habit of checking the compressor oil every time it was ran