I use them in my reverse osmosis water filter system. I only have a 3rd stage and the reverse osmosis membrane needs to be dechlorinated. So I use one for pre-filtering (sludge and chlorine removal) and as a post-filtering (final polish). Since the pre-filter does most of the work, I replace the post-filter with the pre-filter and add a new one of the theses to the post-filter. I do this every 3 months and the water has been great. Great price for 4.
NANPU 1/2" NPT Air Drying System - 5 Micron Particulate Filter, 0.01 Micron Coalescing Filter, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl W/Metal Gauge
23 Review
NANPU 1 FRL Air Filter Regulator Lubricator Combo With 0-150 Psi Gauge, 5 Micron Brass Element, Poly Bowl & Semi-Auto Drain - Metal Bracket Included
20 Review
NANPU Air Drying System With Double Filters And Pressure Regulator Combo For Clean And Controlled Air Supply
18 Review
NANPU 3/8" NPT Compressed Air Filter Regulator Combo Piggyback, 5 Micron Brass Element, Poly Bowl, Semi-Auto Drain, Metal Bracket, 0-150 Psi Gauge
26 Review