Check the listing for details. 1" INDUSTRIAL GRADE HIGH FLOW PARTICULATE FILTER WATER TRAP PRESSURE REGULATOR. Condition: New. Listed at 135.80 USD. SUPER HEAVY DUTY INDUSTRIAL GRADE PIGGY BACK / INTEGRAL STYLE FILTER REGULATOR COMBINATIONPUSH PULL ADJUSTMENT KNOB THAT SHOWS PRESSURE INCREASE AND DECREASE MARKED ON TOP OF THE KNOB.SIMPLY LIFT KNOB TO ADJUST PRESSURE RANGE AND PUSH DOWN TO LOCK INTO PLACE. 160 CFM FLOW RATE REGULATOR WILL ADJUST 7 PSI MINIMUM THROUGH 225 PSI MAXIMUM 250 PSI MAXIMUM INPUT PRESSURE 1" FEMALE NPT INLET X 1" FEMALE NPT OUTLET. PLEASE NOTE IF DETERMINING YOUR NPT THREAD SIZE WITH A TAPE MEASURE, RULER OR CALIPER. 1" NPT MEASURES 1.315" OUTSIDE THREAD DIAMETER IN INCHES. 11oz METAL BOWL WITH VISIBLE SIGHT GLASS TO VIEW MOISTURE LEVELS AT A GLANCE. THIS UNIT COMES WITH MANUAL STYLE PUSH DRAIN WALL MOUNTING BRACKET AND BACK MOUNT PRESSURE GAUGE INCLUDED WITH EACH UNIT. GAUGE PORT IS 1/4" FEMALE NPT. OPERATION INSTRUCTIONS ALSO INCLUDED. 5 MICRON ELEMENT FOR PARTICULATE FILTER REMOVES 95% OF WATER MOISTURE FROM COMPRESSED AIR LINES. PLEASE NOTE: THE BEST STAGE 1 MOISTURE PREVENTION IS YOUR COMPRESSED AIR LINES THEMSELVES. ALWAYS FORCE COMPRESSED AIR TO CLIMB VERTICALLY, WHILE WATER AND MOISTURE ARE FORCED DOWNWARDS BY GRAVITY. THIS WILL EXTEND THE LIFE OF YOUR FILTRATION ELEMENTS AND YOUR AIR TOOLS. PLEASE SEE A FEW ATTACHED PICS OF POPULAR COMPRESSED AIR PIPING TECHNIQUES AND INSTALLS. FOR A TAMPER FREE SAFETY FEATURE, SIMPLY REMOVE THE REGULATOR KNOB ONCE YOU HAVE PRESET TO YOUR DESIRED CUT-IN AND CUT-OUT PRESSURE. THE REGULATOR KNOB CAN ACT LIKE A KEY WHEN YOU NEED TO ADJUST THE PRESSURE AGAIN. THIS PREVENTS PEOPLE FROM TAMPERING WITH THE SET PRESSURE.