Free delivery and returns on all eligible orders. Shop MEANLIN Industrial NPT Air Drying System, 3 Stage, 1/4 Inch, Coalescence Filter, Particulate Filter and Air Regulator, Manual Drain for Air Tools and Gun Compressor Air Drying System SAU470-N04DG-MEP 4-Stage Compressed Air Drying System | Particulate Filter, Coalescing Filter, Pressure Regulator & Water Separator 1 2 Npt Auto Drain Metal Bowl 4 Stage Air Dryer System The three-stage air filter system features two 3/4 NPT ports and one 1/4 NPT pressure gauge port, operating steadily within a range of 0-240 PSI and includes a manual drain function Port Size The three-stage air filter has three ports, two 1/4 NPT holes and a 1/8 NPT port. NANPU DFR-02 1/4 NPT Air Drying System - Double Air Filters, Air ADJUSTMENT KNOB The air pressure regulator features a plastic adjustment knob that allows gentle light touch flow settings, button with a locking function and cannot be rotated when the button is pressed