Portable air tank is great for inflating tires, cleaning around the home, in the garage or workshop. Fills from any air service station or air compressor. 5 Gallon Air Tank 3 ft. Industrial Grade Hose included Built-in carry handle Air-line shutoff Pressure gauge & Regulator 150 PSI Maximum Pressure Air chuck
No, it has a by pass valve spring.
1/4 inch 85-125 max psi Should not mold or mildew
I would say less than 5 lbs it's very lightweight .
It doesn't have a hose, except for the little hose to fill your tires. You would need to buy some fittings and a hose to make it operate your nail gun. I'm sure the have adapters to get you to the right size.