TQ-MD-EAD is designed to remove condensate from compressors, compressed air dryers and receivers up to any size. It comes with the micro-switch feature ( TEST ) and is simple to install. Maximum working pressure 230 PSI. Go to our web site to see our other compressor parts. http://techquipparts.blogspot.com We have in stock, rebuild kits and parts for Techquip and Air Boss air compressors. Air line filters, regulators , in-tank check valves, safety valves , auto moisture drains , electronic time auto drains