I have a 10 HP compressor that we use quite a bit, so it accumulates a fair amount of water in the tank.
The tank is a horizontal tank with a drain on the bottom.
I would like to find some good solution to draining that water that would quietly drain water into a bucket. I recall seeing one drain like this at some factory. I do not remember how it worked, but it was some copper line from the compressor bottom, going up, then there was something clever, and it drained nicely into a bucket.
A lot of "electronic" drains simply open a valve every 45 seconds. I do not like this design, as it wastes air and is noisy.
Also note that if I drain the bottom of a horizontal tank, water would be mixed with air, so the drain needs to be able to deal with that.