| i have the one in the second picture, it came with my compressor from everthingairbrush.
i too have no idea what is ment by "bleeding" the air. but these two are not the compressors they pressure regulators and water traps. now i know on the 2nd one there is a little thing on the bottom you press to release the water that collecs and im guessing that is whats at the bottom of your one ( the silver bit ) so maybe it means bleeding the water not the air?
just an idea.
Richard |