A modified single-handled faucet is configured to permit the faucet to dispense hot water only if the operator actuates a hot water demand switch. The control valve couples the outlet of the faucet to the cold water source unless the operator actuates the hot water demand switch, and thereafter permits water to be dispensed from the hot water source, preferably via a conventional mixing valve that mixes hot and cold water in a desired proportion prior to dispensing the mixed stream.