Which way should air flow through this oil/water filter

compressortools

So, I picked up an oil/water filter for painting with my compressor. Unfortunately, the thing had zilch for instructions, and I'm not sure which way the air should flow. Which side (male threaded side or female threaded side) should be connected to the compressor, and which should be connected to the tool?enter image description here

Best Answer

tool --> female-filter-male <-- compressor

By putting the male end toward the compressor, the water drain valve will be on the "low end" when you drain it.