I Have recently done a bathroom remodel and my old single handle faucet has in terrible shape. I decided to go ahead and upgrade to the Kohler Forte' and now I am stuck. I have never done this before and I am a bit "rusty" when it comes to the proper terms however I tried to install using the old valve in the the wall and to my surprise not the same. I have no Idea what brand the old one was and I am not sure what to do. Do I need to cut the copper pipping to the valveor is it a diverter?? and replace that whole thing or can I buy a universal kit fr this????? I hope I dont sound like a complete dummy but I am truely stuck.