Two units, one mud and one activated carbon filter. just be careful The entire rig has either left or right water entry and I didn't see this listed in the Revain note. I did my install fresh, but I could have saved myself some troubles by choosing the right one. Otherwise, I've been using the same device for over 15 years. You will need a plastic wrench and extra washers, as well as some petroleum jelly to use with the new washers when changing the filter. However, there's no indication of when the filters need to be changed, although you can order clear canisters for a higher price (I haven't).
🔧 NANPU 1/2" NPT Compressed Air Filter Regulator Combo Piggyback with Auto Drain, 5 Micron Brass Element, Poly Bowl, Metal Bracket, and 0-150 psi Gauge
18 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