Sorry, thought you were looking for one. Misunderstood. How do you want to hook it up? If you have a faucet, you can hook to that. You can use a saddle valve and pierce a copper line. Or you can take pipes apart and make yourself a new tap. The easiest it the faucet. They sell a piece at Home Depot that screws onto the faucet and has a little nipple coming out the side. The RO hooks to that and there's a little button looking thing that switches it on. When the little button thing is pulled out, the RO runs, and when it is pushed in it works like a regular sink.