I currently have a water valve behind my refrigerator, but it's not hooked up to our current refrigerator. I have no tubing coming out of the valve. We purchased a new refrigerator and want to hook up a water line to it. The company we bought it from will bring a water hose with it. Do I need to do anything else to the valve before they hook up the water hose?
You will need a compression fitting for both ends if you don't already have them. Often the fridges will come with a plastic supply line but I always like to replace it with a copper one as they last longer and are less prone to damage.
You might also want to verify the valve works correctly. If it is a piercing-type valve, the often fail and should be replaced with a soldered/compression fitting.