The installation instructions should state that you need to remove the internal filter cartridge and plastic liner. I was willing to send it back due to lack of water pressure when flushing as instructed. I took it apart to get as much water out as possible before sending it back to find the cartridge is wrapped in plastic which provides excellent water pressure when removed.
NANPU Air Drying System With Double Filters And Pressure Regulator Combo For Clean And Controlled Air Supply
18 Review
NANPU DFR-02 1/4" NPT Air Drying System - Double Air Filters, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl
20 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
Filter under the sink Aquaphor Favorit ECO silver
20 Review