You will need at least two pair of pliers, adjustable wrenches or something similar to disconnect the faucet. With one of the pliers supporting the water line and the other on the faucet unscrew the valve from the housing. There are times when the faucet is soldered onto the water line in which case you will not be able to unscrew it. If this is the case the line may have to be cut off and an adapter installed for the repair. A shark bite or gator bite fitting would make for a great repair adapter in this case.