A 20 gallon capacity compressor is one of the big compressors which most of the experts recommend to avoid delay between tasks.
Although 20 gallon is the highest choice whatever you also be select a 2 to 6-gallon capacity air compressor pancake
that you easily use for an impact wrench that provides a maximum of 150 PSI and the requirement of the impactor is 90 PSI
For impact wrench, a 20-gallon capacity compressor easily comes with 4 to 5 CFM at 90 PSI and that easily runs 1/2 impact wrench.
Best Affordable almost all the feature includes of air compressor for impact wrench you can select according to your requirements.