Balcrank Filter/Regulator fits 1/2" NPT(F) and includes an automatic drain and pressure gauge. Single-Piece Filter/Regulators are the best choice for pump air control, with a filter to prolong the wear life of the pump, an automatic drain to remove moisture, and a regulator to adjust the pump air supply pressure for the best performance. Standard Series filter/regulators are for heavy-duty lube systems and offer excellent water removal efficiency, featuring a 40-micron, depth-style filter with a large filter element, two (2) high-flow 1/4" gauge ports, a metal bowl with sight glass, and a heavy-duty, die-cast zinc body with a max primary pressure of 250 PSI.