Why Is My Water Heater Leaking From the Top?

Understanding what to do if a water heater is leaking is crucial for safety and operational efficiency. A water heater leaking from the top often indicates complications with its inlet and outlet connections, but water heaters can leak for a wide variety of reasons. Whether your water heater leaks from the top, side or bottom, seeking professional inspection and repair is often the best solution.

Why Is My Hot Water Heater Leaking From the Top?

Inlet or outlet connections are typically the source of water heater leaks from the top. The following complications can cause an inlet or outlet to leak:

  • Loose connection: If an inlet or outlet connection is loose, you can tighten it to resolve the complication.
  • Corrosion: Inlet pipes, outlet pipes and the threaded fittings that connect them to the water heater tank can corrode. Corrosion is especially common when a pipe is made of a different metal than the tank because one metal corrodes faster than the other. 
  • Faulty temperature and pressure (T&P) valve: A faulty T&P valve is typically located near the tank’s output pipe. It can leak due to wear and tear, excessive pressure within the tank or mineral buildup.

If your hot water leaks from the top, you may need to replace an inlet pipe, outlet pipe, threaded fitting or T&P valve. A water heater replacement is important if you find corrosion because it can gradually worsen and lead to flooding and water damage.

Other Causes of Water Heater Leaks

Water heaters can leak from the top, side or bottom for various reasons. Common causes of water heater leaks are the following:

Faulty Pressure Relief Valve

A pressure relief valve or temperature and pressure valve automatically releases excess hot water and pressure from a tank if it reaches unsafe levels, preventing the tank from bursting. This safety feature opens up to release steam and water, but it can also cause significant or continuous leaks if it’s faulty or lacks the proper seal. 

Mineral buildup, corrosion and general wear are typically the cause of pressure relief valve complications, and they can cause your water heater to leak from the side. Replacing a faulty pressure relief valve as soon as possible is vital because it protects your family from scalding water and a potential burst.

Gas Leak

Gas leaks can also cause a pressure relief valve to open if the gas causes too much pressure inside the tank. A gas leak presents serious fire risks, so it’s important to take the following steps if you notice a foul rotten egg smell around your water heater or in your home:

  • Turn your home’s main gas supply valve off immediately
  • Avoid using anything that could cause a spark inside your home, including your cell phone
  • Leave your home and call 911 and your gas supplier

Tank Corrosion

A water heater tank’s inner lining can gradually corrode as water temperatures fluctuate. An anode rod attracts corrosive elements and sacrifices itself to prevent the tank from rusting and increase its longevity, but the rod wears over time. When this happens, cracks can form anywhere in the tank and allow water to leak through.

If you notice moisture on the outside of your water heater tank or puddles on the floor around it, you may need a replacement. Inspecting your anode rod and replacing it when it starts to rust can help you prevent tank corrosion and extend your water heater’s life span.

Sediment Buildup

As a water tank ages, sediment can gradually accumulate on its inner lining. This buildup is another factor that can corrode the tank’s lining and eventually lead to cracks and leaks. You can prevent sediment buildup by draining and flushing your tank at least once annually.

Damaged or Loose Drain Valve

Your water heater tank’s drain valve enables you to drain the tank for maintenance, but it can also be the culprit of a leak. If the drain valve is loose, tightening it should resolve the leak. However, a leak may also occur due to one of the following complications:

  • Worn gasket
  • Sediment buildup surrounding the valve
  • High water pressure that damages the valve’s seals
  • Damaged valve body

If you notice a damaged drain valve or ineffective seals around the valve, contact a plumber for professional replacement.

Is It a Leak or Condensation?

Ambient temperature changes may cause condensation from your water heater tank to accumulate on its top, side or bottom surfaces. While this may resemble a leak, it’s normal and requires no attention. Condensation dries quickly after you wipe it away, while a leak produces significant puddles or consistent water droplets.

 

How to Fix a Water Heater Leak

Most water heater complications require professional attention for safety and effectiveness. A plumber can inspect your system, identify the exact cause of a leak and complete the necessary repair or replacement. Experienced plumbers have the skills, experience and tools to ensure your system operates efficiently and prevent further complications. Take the following steps as soon as you notice a leak to protect your home’s safety and water heater’s integrity:

  • If you suspect a gas leak, turn off your gas supply, leave your home and call 911 and your gas supplier immediately.
  • Turn off your water supply by turning the main water shut-off valve clockwise or closing its lever handle.
  • Turn off your water heater’s power source if it’s electric.
  • Contact a plumber for professional inspection and repair.

Identifying and addressing leaks early is vital for your water heater’s efficiency and your family’s safety. In some cases, it’s best to replace your system with a new, more efficient water heater. It’s also helpful to schedule maintenance at least once a year to prevent sediment buildup, wear and tear and damage.

Preventing Future Leaks

Preventive water heater maintenance prevents future leaks and helps extend your water heater’s life span. Schedule professional maintenance at least once a year so a professional can drain and flush your tank and inspect all valves and connections.

 

Trust IT Landes Home Service Team With Your Water Heater Needs

Addressing water heater leaks is essential for proper water heater operation. IT Landes Home Service Team offers water heater repair and maintenance services you can depend on. Our professionals deliver expert workmanship to ensure your system operates safely and efficiently, and we provide transparent pricing and financing options to help you stay within your budget. 

From minor repairs to installations and upgrades, you can trust IT Landes Home Service Team to restore your home’s hot water. Schedule an appointment or contact us to learn more and request a quote. 

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