Tondiamo Air Compressor Valve, Mini Metal Ball Type Air Tank Drain Valve Brass, 1/4 Inch NPT Male x NPT Female for Air Compressor Part(2 Pieces)

Thes work wonderfully. Using one to create a sort of controlled vacuum leak on an old carbureted car while diagnosing an idle issue. The fittings are machined correctly and fit up nicely, and the ball valve doesn't leak, so allows a bit of precision in just how much air I can let bypass throttle plates. If I found another application in which these would work I wouldn't hesitate to purchase again.

Great upgrade. We'll made.

This is much easier to use than a standard air compressor drain. It feels solid and works well. The little handle is plastic so it will not last forever, but it works perfectly and I like it.

I had the need for a very compact shut off valve. These valve are well made but be aware that there are no female threads on one end. The description states there are both 1/4” male AND female. There is not a view in the description to see for yourself. This valve is suitable for a drain/vent only and it makes sense that there wouldn't be room for a female port due to the small size of the valve body but I didn’t consider that.

So much better than the original valve that came with my Bostich compressor. Unfortunately while testing the new valve my compressor died. ORDERED A NEW compressor and will replace the the valve with this one

Easy to drain compressor! Makes the job simple.

I use this to drain my air compressor tanks on my portable air. Compressor works great.

easy job now is faster and better fit perfectly 1/4 npt