
The airflow direction is left to right when viewed from the rear, which is right to left when viewed from the front, as shown in the figure. On the attached picture of the packaging (unfortunately not shown in the product photo), I marked the arrow with silver paint so that you can see it.

NANPU Air Drying System With Double Filters And Pressure Regulator Combo For Clean And Controlled Air Supply
18 Review

NANPU Compressed Air Filter Regulator Combo: Brass Element, Semi-Auto Drain, 0-150 Psi Gauge, And More
21 Review

Filter under the sink Aquaphor Favorit ECO silver
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