I have a Delta kitchen faucet that was leaking. I replaced the rings and springs that were in a kit I bought. About two days later when I turned the faucet on no water came out! After I removed the handle and the ball I checked to see if the water would come up, and it did. The problem is that as soon as I put the metal cap over that white plastic shield the water stops. I do not know the plumbing name for the shield but it is the one that has a small notch on the left and goes on right before the metal. It is very odd because when the metal is removed and I turn the water back on the water comes out. There is not an obstruction in the faucet and I have replaced the handle. The water sounds like it is going to come on and then seems to just stop. I hope you know what I mean-there is a sound in the pipe or faucet when I turn the water back on under the sink and move the handle, but then nothing comes out. It seems like something that should be easy to fix, but every time I put the metal over the shield the water ceases to flow. I will appreciate any help!