In another thread, I asked what might happen when an air compressor tank rusts from condensation. The potential for serious injury/death/catastrophic facility damage moved me into purchasing a new compressor. Now that I have been properly educated, I will be much more attentive to this one. This leads me to ask the following question....
I have seen some electronic compressor drains, many of which work by opening the drain valve for 2 or 3 seconds every 45 - 60 minutes. Assuming that this is sufficient to purge water from the tank, this tells me that totally emptying the tank of air is not a requirement to adequate removal of condensate. I power down my compressor at the end of each day but if I open the drain valve for (let's say) 10 seconds each time, the tank will still be filled with mostly compressed air. So...and here is my question....should I totally deplete the air every day or can I leave what's left overnight for use tomorrow?