MettleAir AW3000-N02-1PKD Automatic Drain Air Filter/Regulator with Gauge, 2000 L/minute, 1/4" NPT Model: AW3000-02D Ports: 3/4" NPT Gauge Port: 1/8" NPT Rated Flow: 2000/L min (70.63 SCFM) Bowl Material: Polycarbonate with Metal Cover