Okay I have reviewed a couple of others use of using oil catch can that is used with positive crank check valve // I have the following concerns Size of catch can small/big Material type all metal/clear abs inline or other Currently consider small inline clear plastic style aka same as air compressor air /oil separator style so quick visual inspection and drain can be relative straight forward maybe this 1/4" Air Line Oil Water Trap Separator Filter For Compressor Spray Paint Tools | eBay
