Re: Air Pressure won't build Reply #60 – January 09, 2023, 09:00:40 am I have experienced the large stainless braided line (supply line) clogged frome carbon from a well used compressor to cause this also.Basically lack of volume that low of pressure any item would consume 20psi. D2 is a common problem cheap truck pro or fleet pride sell them cheap. I replaced mine last year and it was preset to 135psi. Truck pro 38 bucks. Quote Selected