WELLMATE BRAND MICRONIZER INSTALLATION INSTRUCTIONS INCLUDED THIS MECHANISM IS A VENTURI WHICH DRAWS AIR INTO THE SYSTEM TO CONTINUALLY CHARGE TANK WITH AIR. TO BE INSTALLED RIGHT BEFORE WELLMATE HYDRO PNEUMATIC TANK TO BE INSTALLED IN CONJUNCTION WITH AN AIR VOLUME CONTROL ASSEMBLY WHICH IS INSTALLED IN THE TANK. PRESSURE RANGE: 10-60 PSI FLOW RANGE: 5-15GPM 1" MALE PIPE THREADS IN AND OUT SIDE 3.25" TALL 3" WIDE 5.5" LONG