1/2" Pressure Regulator/Particulate Filter Moisture Water Trap Compressed Air - - Amazon.com
Air Filter / Regulator kit with gauge and two fittings | Seal-Rite Products LLC
3 STAGE, HEAVY DUTY INDUSTRIAL GRADE FILTER REGULATOR COALESCING DESICCANT DRYER SYSTEM FOR COMPRESSED AIR LINES, METAL BOWLS, GREAT FOR PAINT SPRAY AND PLASMA CUTTER (1/2" NPT, AUTO DRAIN) - - Amazon.com
1/4"NPT Air Filter Pressure Regulator, Water-Trap Air Tool Compressor Filter with Gauge by ZHONG AN - - Amazon.com