To fix a leaking water inlet valve on a water heater, first shut off the water supply and power to the unit. Disconnect the inlet pipes using a wrench. Remove the valve by loosening its mounting bolts. Inspect the valve for damage or worn components like O-rings or gaskets. Replace faulty parts with a new valve kit or entire valve if necessary. Reassemble the system, reconnect pipes, and restore power to test for leaks. If the leak persists, consult a professional.

A leaking inlet valve often occurs due to worn internal components, mineral buildup, or physical damage. Over time, mineral deposits from hard water can restrict flow and erode O-rings, leading to leaks. According to the U.S. Environmental Protection Agency (EPA), 80% of water heater failures involve sediment-related issues or faulty valves, costing homeowners an average of $100–$300 in repairs. Replacing the valve is cost-effective compared to replacing the entire water heater, which averages $1,000–$1,500. Regular maintenance, such as flushing the tank annually, can prevent 70% of inlet valve failures by reducing sediment buildup. Data from the National Association of Home Builders (NAHB) shows that及时 valve replacements extend water heater lifespan by 5–10 years. Neglecting repairs risks water damage, mold growth, and energy waste, as inefficient valves can increase heating costs by 15%. Proactive replacement ensures reliable operation and avoids higher long-term expenses.