IMPORTANT :::COMPRESSED AIR CONTAINS NATURALLY OCCURRING MOISTURE, WHICH CAN NEGATIVELY AFFECT COMPRESSED AIR APPLICATIONS THAT REQUIRE MOISTURE FREE AIR. DRYERS ARE A COMMON SOLUTION FOR REMOVING SUCH MOISTURE. IT IS VITAL THAT LIQUID WATER AND OIL ARE REMOVED FROM YOUR COMPRESSED AIR LINES BEFORE ENTERING ANY REFRIGERATED AIR DRYER. LIQUID WATER AND/OR OIL FROM YOUR COMPRESSOR CAN DAMAGE THE INTERIOR COMPONENTS OF THE DRYER RESULTING IN DRYER NON-PERFORMANCE OR FAILURE. SCHULZ REQUIRES A MINIMUM OF A 1 MICRON IN-LINE FILTER TO BE USED BETWEEN THE COMPRESSOR OUTLET AND THE DRYER INLET. A 3 MICRON FILTER IS THE MINIMUM REQUIREMENT HOWEVER STILL NOT THE BEST SOLUTION. FOR THE BEST RESULTS AT REMOVING MOISTURE WATER AND OIL FROM YOUR COMPRESSED AIR LINES IS A WATER SEPARATOR + COALESCING FILTER. IF YOU SELECT THE AMAZON LINK MARKED " WITH PRE-FILTER" ABOVE. THAT GETS YOU THE REFRIGERATED AIR DRYER + AN INDUSTRIAL RATED STAGE 1 WATER SEPARATOR WITH 3 MICRON ELEMENT AND AUTO DRAIN. ANOTHER EFFECTIVE WAY TO SEPARATE MOISTURE WATER FROM YOUR COMPRESSED AIR IN YOUR COMPRESSED AIR LINES, STARTS WITH THE COMPRESSED AIR LINES THEMSELVES. WHEN YOU ARE SETTING UP OR INSTALLING YOUR PIPING, YOU ALWAYS WANT TO FORCE YOUR COMPRESSED AIR TO CLIMB VERTICALLY, WHILE POOLING LIQUID WATER IS DRIVEN DOWNWARDS BY GRAVITY. USUALLY INTO SOME SORT OF DRAIN OR BALL VALVE THAT IS RELEASED PERIODICALLY.VIEW OUR ATTACHED PICS FOR OUR RECOMMENDED COMPRESSED AIR LINE SET UP WITH FILTERS AND BY PASS.