A hot water heater may leak for several reasons, ranging from minor issues to significant tank failure. Common sources of leaks include:
- Loose fittings and connections: Inlet and outlet fittings on top of the tank can become loose or fail over time, often causing intermittent drips.
- Faulty valves: The temperature-pressure relief (TPR) valve or the drain valve at the base may leak if they are damaged, improperly seated, or failing due to age.
- Sediment buildup: Mineral deposits from hard water settle at the bottom of the tank. This buildup can cause rumbling noises, reduce heating efficiency, and eventually lead to corrosion or failed seals, resulting in a leakจาก the bottom of the tank.
- Tank corrosion: If the internal tank or the anode rod has corroded significantly, it can lead to persistent leaks or even high-pressure bursts. This is particularly common in units aged 10 to 15 years.
- Overpressure issues: High water pressure within the system can force water out of the relief valve. This may indicate the need for an expansion tank or pressure regulator.
If you discover a leak, you should immediately shut off the power or gas supply and the cold water inlet valve to prevent water damage and safety hazards.
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