The thread is too big. No matter how much teflon tape you put on your 1 inch adapter, there's a good chance it will leak. I bought two of these and luckily one is holding up but the other just keeps leaking. After unscrewing the PVC adapter for the third time and stretching it with Teflon tape, the brass insert finally broke. Should have listened to other reviews on this item before purchasing. Lesson learned. Do yourself a favor, get another brand or something.
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
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 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