Replacing a water heater faucet involves shutting off the heater's power or gas supply, disconnecting the old faucet, installing a new unit with proper threading, and testing for leaks. Always use a pipe wrench and PTFE tape for secure connections. Safety gear like gloves and goggles is recommended. For hot water systems, ensure the faucet has a temperature limit to prevent scalding.

The importance of water heater faucet replacement stems from aging components causing leaks, reduced efficiency, and potential cross-connection risks. According to the U.S. Environmental Protection Agency (EPA), fixing leaks can save households up to 10,000 gallons of water annually, reducing water waste. The U.S. Department of Energy notes that outdated faucets may account for 5-15% of energy losses in water heating systems, translating to higher utility bills. Replacing faucets every 5-10 years aligns with industry standards for maintaining system longevity. Additionally, the American Water Works Association (AWWA) highlights that corrosion or mineral buildup in old faucets can contaminate drinking water, necessitating proper installation with materials like brass or copper to prevent cross-contamination. The average cost of replacement ranges from $100 to $300, which is significantly lower than emergency repairs or system failures. Data from the National Association of Home Builders (NAHB) shows that proactive maintenance reduces the likelihood of costly water heater replacements by 40%. By following replacement protocols, homeowners enhance safety, conserve resources, and optimize energy performance.