To fix a broken water heater inlet valve, first shut off the power and water supply. Turn off the gas valve or unplug the electric heater. Drain the tank by opening the drain valve to remove water and debris. Disconnect the inlet pipes from the valve using pliers or wrenches. Replace the valve with a compatible model, ensuring O-rings or seals are intact. Reconnect pipes, refill the tank, and restore power. Test for leaks and proper water flow.

This process addresses common failure points in water heater systems. The inlet valve regulates water flow into the tank, and its malfunction can lead to water loss, inefficiency, or overheating. According to the U.S. Department of Energy, 14-18% of household energy costs are tied to water heating, making valve repairs critical for cost savings. A 2021 study by the National Association of Home Inspectors found that 30% of failed water heaters were due to valve leaks or blockages, often caused by mineral deposits or corrosion. Replacing the valve restores proper water flow, preventing sediment buildup and extending tank lifespan. The U.S. Environmental Protection Agency (EPA) also highlights that annual maintenance, including valve inspections, can reduce energy waste by up to 15%. Incorrect installation or undersized valves may cause pressure imbalances, increasing the risk of tank explosions, as noted by the American Water Works Association. Using a licensed technician ensures compliance with safety standards, particularly for gas-powered heaters, where improper repairs can lead to carbon monoxide leaks. Proactive valve replacement mitigates long-term risks, such as water damage to floors or appliances, which the Insurance Institute for Property Loss Prevention estimates costs homeowners $5,000 annually on average.