There is a visual window at the top which automatically pops up a green indicator when the filter needs changing. When the desiccant bead in the air dryer turns from blue to pink, it indicates that the desiccant bead needs to be replaced Stage 1: Filter & Regulator]Compressed Air Water Trap Filter Equipped with 5 Micron Brass Element, which has Excellent Filtering Performance, Much Longer Life and Reuse Feasibility, Remove Most of Moisture and Particles in the Air Line; Pressure Regulator Accurately Adjust and Stabilize the Air Pressure 【Industrial Grade 3 Stage Air Drying System】The Automatic Draining Industrial Grade Air Compressor water separator system features two 1/2 NPT ports and one 1/4 NPT pressure gauge port, The pressure range is easily adjustable within 0-240 PSI. 1/2 NPT 3 Stage Air Drying System,Heavy Duty Industrial Grade Air Compressor Water Separator System,Filter Oil Water Separator Dryer for Plasma Cutter and Paint Spray,0-240 PSI,Auto Drain 3/4 NPT Industrial Grade 3 Stage Air Drying System, France Industrial Performance]The air compressor dryer features two robust 1/2" NPT air ports and a 1/4" NPT gauge port, handling high-pressure environments (up to 240 PSI) for various industrial applications (Do not install horizontally) with a 5-micron element, Removes 95% of particles and moisture. 🌷 High quality after-sales Service：Our 1/2 NPT Industrial Grade 3 Stage Air Drying System Equipped with a pressure gauge, air connectors, pipe fittings, replacement filter elements, desiccant beads, and thread seal tape. 4 Stage Air Dryer System LNCHKA Industrial Air Dryer Filter 1/2NPT ,0-150PSI,Air Compressor Water Separator,Air Compressor Filter AF4000-04,5 Micron Brass Element,Semi-Auto Drain,Poly Bowl Double Desiccant Dryer Compressor we will quickly provide you with a satisfactory solution！and take responsibility for our products
