Parker 14E11B18FC One-Unit Combo Compressed Air Filter/Regulator, 1/4" NPT, Polycarbonate Bowl, Manual Drain, 5 Micron, 18 scfm, Relieving Type, 2-125 psi Pressure Range, Gauge Parker 14E miniature series compressed air filter/regulator for water and particulate removal, and air pressure control Single-unit, integral, "piggyback" filter/regulator for space-saving installations Relieving-style regulator exhausts excess pressure for increased performance and safe operation Removable, non-rising knob for tamper resistance Male National Pipe Taper (NPT) threads for connecting to female threaded pipes