Product review (5 stars): Whirlpool 2256126 Reservoir for Refrigerator - coiled pipe
Simple product, just a very long coiled plastic pipe that sits in the rear (interior) of your refrig. Replacement is pretty simple w/ a few basic tools and is a good way to refresh an old cold water dispenser. Literally a refresh, since the old pipe was pretty dirty after 12 yrs of high-iron well water. Water now pours much faster and also tastes much better. Also, check your water filter if you have one. If it's past six months old it'll likely slow down the flow as well.