A leaking water heater can lead to more than just cold showers. It can also cause long-term water damage to your home or create safety risks if the issue is ignored.
Methods for fixing a leaking water heater range from simple to more complex, but whether it can be repaired depends on the source of the leak. In some cases, repairs are possible. In others, the unit may need to be replaced.
What Are The Common Causes Of Hot Water Leaks?
Some of the signs of a leaking water heater to look out for include:
Pools of water around the water heater, especially underneath it, are a common sign of a leak and should be addressed as soon as possible. Water may also come from nearby pipes or valves, not just the tank itself. Condensation on a water heater can be normal, particularly when cold water enters a warm tank or in humid conditions. Condensation alone does not always indicate a leak, but it should still be monitored.
Rusting on or around the water heater, including valves and pipe connections, is a sign of corrosion. If corrosion affects the tank itself, the water heater usually cannot be repaired and will need to be replaced.
Foul smells around the water heater can sometimes be caused by standing water near the unit. A rotten egg smell is more commonly linked to bacteria reacting with the anode rod inside the tank rather than a leak.
Unusual noises such as banging, popping or hissing often come from sediment buildup inside the tank. While noise does not directly cause leaks, sediment can lead to overheating and increased stress on the system, which may result in valve discharge.
An increase in utility bills without a change in hot water usage can sometimes indicate a problem with the water heater, including leaks or reduced efficiency.
How To Fix A Leaking Water Heater
Tightening The Drain Valve
One common cause of water heater leaks is a loose drain valve. Over time, this valve can loosen and allow water to escape.
To address this:
- Turn off the power or gas supply to the water heater
- Locate the drain valve at the base of the unit
- Place a bucket underneath to catch any water
- Carefully tighten the valve using a wrench
Do not overtighten the valve, as this can damage the fitting. If the valve continues to leak, it may need to be replaced.
Replacing The Temperature And Pressure Relief Valve
Another possible cause of leaks is a faulty temperature and pressure relief valve. This valve is designed to release excess pressure or heat to prevent damage to the tank.
If this valve is leaking, it may be due to high pressure, high temperature or a faulty valve. In Australia, replacement of a temperature and pressure relief valve should be carried out by a licensed plumber, as it is a critical safety component.
How To Prevent A Leaking Water Heater
One of the most effective ways to reduce the risk of leaks is regular maintenance.
Some maintenance tasks include:
- Flushing the water heater tank to reduce sediment buildup
- Checking that the temperature and pressure relief valve is operating correctly
- Inspecting the anode rod for corrosion
- Ensuring the thermostat is set correctly and functioning properly
If you are unsure about any maintenance task, it is best to contact a licensed professional.