SOUTHERN-FRL 1/2" Compressed Air Moisture Filter Regulator Oiler Separator Lubricator Combo Product Features 1/2" NPT FRL Unit Max Supply Pressure: 250 PSI, Max Operating Pressure: 150 PSI 178 SCFM, 40 Micron Element Standard Manual Drain & Metal Bowl, Includes 0-300 Gauage & Bracket Product Description 1/2" NPT FRL Unit Max Supply Pressure: 250 PSI, Max Operating Pressure: 150 PSI 178 SCFM, 10 Micron Element Standard Manual Drain & Metal Bowl, Includes 0-300 Gauge & Bracket