The water valves must be disassembled, so that you can easily clean them. Place the bucket on the towel and secure the bucket by using a heavy object. After that, turn on the water supply fully. The water will flow out of the valve's empty body and into the black and copper kitchen faucet. This should clean up any debris left in the faucet's lines. In the meantime, if you still have leftover vinegar, use distilled white vinegar.