air compressor loses pressure quickly
I have a 6 gallon 2.5 HP air compressor purchased about a year ago and previously used with a brad nailer without any trouble. I've recently tried to use it with a paint spray gun that requires 1 HP minimum. Both tools were manufactured by Tool Shop. When using the paint spray gun, the compressor loses pressure in 5 seconds, and I can't get an even spray. When no additional tools are attached or used with the air compressor, it loses pressure in 10 to 15 minutes. Since I've never used an air compressor before, I don't know if this is normal. I consulted with the employees where I purchased both items, and they've opined that I should be able to spray for a longer period of time. Am I fooling myself into believing that I can actually use a paint spray gun with that small of a compressor or do I have a problem with the equipment itself?