I have a Moen kitchen faucet with one arm and it has a part that is clearly not functioning correctly as it sprays water out the side like it is sprinkling rain. It is the filter part on the wand. It screws out and says KK (with a square around that) P 741, a vertical line, A NF (with a circle around the NF,) N-type symbol, AIRFORCE. Can that part be replaced by itself or will I have to replace the entire wand? How do I find out what model my faucet is? It is about 5 years old. Thanks.