I have a 12 inch long non freeze outside tap that is leaking.The tap has a chrome pipe the extends 11 inches inside the house wall. The outside part of the tap has a horizontal rising spindle valve handle, and the spigot aiming down and on top of the valve it looks like a second place to attach a hose but it has a white plastic disc with another inner plastic disc both with rubber washers inside and a chrome cap the threads on. When you take valve handle off you see a inside threaded nut and when removed you find a metal washer with a 1/4" thick washer and then another metal washer thats sits against a small rise on the copper pipe. when you look at it now you see a copper pipe inside a chrome pipe. When you unscrew the copper pipe it comes out and is 12 inches long with a screw on the end then a rubber washer then a small flange with a very thin rubber washer, the screw threads into another flange that has a 3/4" inch in length copper pipe peace attached that has four slices cut out of it and a little lip on the very end. This peace is held inside the copper pipe by just the lip on the end which slides in and out of the end of the 12 inch copper pipe and when pulled out there is a spring inside. The twelve inch copper pipe on the valve handle end just behind where the valve handle is attached there is a small 1/8" hole. My problem is instead of the water travelling JUST between the copper pipe and the chrome pipe and then out the spigot, water gets inside the the copper pipe also which sprays out the 1/8" hole and makes quite the mess outside. I have talked with workers at numerous hardware store plumbing employess and no-one really understands how these valve works or how to fix my problem. I have bought and installed a replacement kit that has new everything except the valve itself and the water still leaks out the whole in the copper line right behind the valve handle. I bought this house 3 years ago and there are no shutoffs for the 2 outside taps and both are hidden inside finished room walls or ceilings. Any help would be very much appreciated. Thanks and have a great week.