never2eksessiv
+1y
if you run a ball valve and you are driving and run out of nitrogen you have to pull over open the valve then your compressor will kick on from the pressure switch but if you run a check valve then when you run out of nitrogen your compressor will just kick back on like regular every day use. and engine driven compressors mioght not come with a check valve on them, so why hassle with a ball valve if you dont have to worry about it