Works as far as I know. If you're unfamiliar with reverse osmosis systems, including push-fit fittings and how they sometimes require extra effort to go all the way (as opposed to halfway if you're not careful), you may have leaks, but that's likely to be the case with any system . In terms of micron size, each size has its pros and cons, including flow rate and durability, in addition to how hard it filters.
NANPU DFR-02 1/4" NPT Air Drying System - Double Air Filters, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl
20 Review
Filter under the sink Aquaphor Favorit ECO silver
20 Review
NANPU Compressed Air Filter Regulator Combo: Brass Element, Semi-Auto Drain, 0-150 Psi Gauge, And More
21 Review
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