Understanding Pressure, Airflow, and Hose Diameter with
What is the cfm output of your compressor at 40 and 90 psi (or however the spec. is listed) for your compressor? Hoses act as restrictors - the longer the hose, the bigger the diameter required to pass the same cfm. The simple answer - for most HVLP appliions where runs are around 25'' - is to use a 3/8" diameter hose and high flow 1/4" fittings.