Why Is My Water Heater Leaking? Common Causes and What to Do Next

Water heater

A leaking water heater is more than just an inconvenience—it could signal a larger plumbing issue or even potential water damage to your home. If you’ve discovered water pooling around your water heater, you’re not alone. At Diamond Plumbing, we help homeowners across Ada, Oklahoma and surrounding areas troubleshoot and repair water heaters every day.

So, what causes a water heater to leak? And how do you know if it’s time for a professional repair or full replacement? Let’s break it down.

Top Reasons Your Water Heater Might Be Leaking

1. Corrosion in the Tank

Over time, minerals in Ada’s notoriously hard water can build up inside the tank, leading to corrosion. Once rust eats through the tank lining, it can start to leak. If this is the case, a full water heater replacement is usually needed.

2. Loose or Damaged Drain Valve

The drain valve at the bottom of your tank allows for flushing and maintenance. If it becomes loose or damaged, you may notice a slow leak coming from the base of the unit. A simple tightening or part replacement may resolve the issue.

3. Faulty Temperature and Pressure Relief Valve (T&P Valve)

This valve is a safety feature that releases excess pressure. If the valve is malfunctioning or the water heater is overheating, water may begin dripping from this component. It's crucial to have this addressed quickly to avoid dangerous pressure buildup.

4. Leaking Supply Lines

Sometimes the water heater itself isn’t the culprit—it's the cold or hot water supply lines connected to the unit. Cracked, loose, or worn-out fittings can cause leaks that may appear to be coming from the tank.

5. Cracked or Damaged Tank

Over time, temperature fluctuations can cause the inner tank to crack. This is a serious issue and usually means it’s time to invest in a new water heater.

Signs You Need Water Heater Repair

If you notice any of the following, it’s time to call a professional:

• Puddles or dampness around the base of the heater

• Rusty or discolored water from hot taps

• A popping or rumbling noise during heating

• A sudden drop in water temperature or pressure

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Delaying water heater repair can lead to larger problems—like mold growth or significant water damage to your home.

What to Do if Your Water Heater Is Leaking

1. Turn Off the Power Supply

   • Electric Water Heater: Switch off the circuit breaker.

   • Gas Water Heater: Turn the gas control valve to “off.”

     
     

2. Shut Off the Water Supply

   • Locate the cold water shutoff valve (usually above the heater) and turn it off to stop the flow of water into the tank.

     
     

3. Call Diamond Plumbing for Help

   • Our experienced technicians can diagnose the problem quickly and provide honest, reliable service. We’ll let you know whether repair or replacement is your best option.

     
     

Local Experts in Water Heater Repair – Ada, OK and Beyond

At Diamond Plumbing, we’ve built our reputation on trustworthy service and quality workmanship. Whether you need a quick repair or a full replacement, we’re here to help with water heater leaks and all your plumbing needs.

Don't wait for a small leak to become a big problem. Call 580.332.7668 or request service online to schedule a water heater repair today.