Austin and Spencer helped me by replacing the stock drain valve with the set-up below. The stock drain valve in every compressor I've seen is almost unusable. The manufacturer must be hoping they will rust out and have to be replaced sooner. All the parts are available in the aviation tool section (plumbing isle) of your local Home Depot. All 1/4" sized. From right to left is a street elbow, a 1.5" nipple and a ball valve. An optional 1.5" nipple on the other side of the ball valve makes it spray better when you're draining the tank on a daily basis. Hope that helps, Charles.