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BLOG - (Heating and Cooling)

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Why Is My Hot Water Heater Leaking? Solutions

5/28/2024

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​Coming home to find a puddle of water under your water heater can be alarming. It’s a clear sign that something might be wrong with your unit and that it needs immediate attention. Water leakage is one of the most common reasons for this issue. It's essential to take a closer look to determine the cause of the leak.
There are several helpful tips and insights you can use to maintain your water heater and avoid any costly repairs in the future. As someone who has dealt with this issue personally, I understand how frustrating it can be. It's crucial to regularly check your hot water heaters and address any minor problems before they become major ones. Knowing what to do in these situations can save you time and money, and ensure that your water heater remains in good condition.

What causes a hot water heater to leak from the bottom?

​In my experience, a water heater leaking from the bottom often results from a failing or damaged pressure relief valve. This valve prevents excessive pressure from building up in the water tank. When it fails, hot water may leak out. Other potential causes include a cracked or corroded tank. Address these issues promptly to ensure your water heater functions efficiently.

Step 1: Ruling Out Condensation

​If you see water on the floor around your water heater, first rule out other causes like condensation. This can be a potential cause if humid air contacts the cooler water heater. If not, investigate further to find the cause of the problem.

Condensation on a Gas Hot Water Heater

●     Wipe up water under the heater
●     Turn the gas control valve to the OFF position
●     Wait for several hours to see if it is wet again under the heater
●     No water means that the heater was condensing

Condensation on an Electric Water Heater

​When you have an electric hot water heater, you might notice condensation forming on the hot cylinder tank if it’s located in a cold room. From my experience, one way to check for this is by wiping down the outside of the hot water heater and then watching to see if moisture returns. If you see it come back in an even pattern across the water heater surface, it’s most likely condensation.

Look for Other Causes

​When dealing with a hot water heater issue, it's important to consider every potential source of the problem. In my experience, many people overlook that their HVAC system might be involved. If your water heater is in the same room as your AC or furnace, any leakage might actually come from these connected systems.
 
For instance, water softener lines and water supply lines can be culprits. Inspect all lines carefully for leaky spots and pipes around your water heater. I once found that a supposed water heater issue was due to a leaky AC pipe above it. Therefore, always check all related systems to pinpoint the exact source and apply the right fixes.

Step 2: Turn Off Power Supply

​When your water heater starts leaking, it's crucial to take action immediately. Begin by turning off the gas for gas heaters or the electricity for electric heaters. Remember, water and electricity don't mix, making this a crucial step you must never skip. If you're not comfortable working with gas or electric water heaters, now is the perfect time to call a professional. It's also important not to mess with any gas piping; leave that to the experts who know how to handle it safely.

Locating Your Gas Shut-Off Valve

​When dealing with your water heater, knowing how to turn off the gas shut-off valve is crucial. Look for the knob or lever at the top of the heater to turn off the gas supply completely. If it's not there, check the supply line for the main shut-off valve.

Locating Your Power Breaker

​To safely work on your electric water heater, turn the circuit breakers to OFF in the electrical panel. Check the label or the diagram on the door to find the correct breaker. Once located, switch its position to OFF to prevent accidents.

Step 3: Turn Off Water Supply

​When you need to work on your water heater, it's crucial to know how to turn off the water supply. First, find the main shutoff valve. It's typically located in the basement or outside near the curb. Turning this valve off will stop water flow into your home. Next, you'll need to turn off the cold-water supply for your hot water heater. Look for two valves on the heater: one for hot water, usually marked in red, and one for cold water, marked in blue. Shutting off the cold-water valve will help prevent further damage from any leaking water.

Step 4: Establishing The Source of Your Leak

​Now that you’ve shut off gas/electricity, your main line, as well as the cold line supply it’s time to figure out the source of your water heater leak.

Step 5: Avoid Future Issues with Regular Maintenance

Regular maintenance of your water heater is crucial to avoid major issues down the line. As someone who has dealt with the headaches of a leaking system, I can't stress enough the importance of preventative care. Over time, sediment and mineral deposits can build up inside the heater, leading to inefficiency and potential leakage. That's why it's essential to flush the system annually. This simple step can reduce the risk of damage and the need for costly repairs.
​
Additionally, you should check for signs of leakage or other damage on a regular basis. If you notice anything amiss, contact a professional to assess the situation. Keeping your heater running efficiently ensures your hot water remains safe and your system operates smoothly. With these preventative measures, you can maintain your heater and enjoy reliable hot water for years to come.

Repairing or Replacing Your Water Heater

​Maintaining water heaters in our homes is crucial. If your heater is leaking or shows visible signs of damage, take immediate action. Regular maintenance helps, but a professional may be needed for replacement. Contact a professional to inspect the system and give advice on repairing or replacing. Replacing an old heater can improve efficiency and reduce costs.
Advantages: When considering whether to repair or replace your water heater, it's important to understand the advantages of a new unit.
  • New water heaters offer high energy efficiency,
  • Improved heating and enhanced safety features.
  • Also come with a warranty that ensures peace of mind.
Although the initial cost of a new water heater, whether tank or tankless, might seem high, the long-term savings on energy bills make it worthwhile. Upgrading to a more efficient model can significantly reduce your monthly expenses and provide a greater sense of peace and mind.
Also Read: Common Reasons for a Leaking Water Heater

Frequently Asked Questions

Can I still use a water heater if it is leaking?

​If your water heater is leaking, address it immediately to avoid flooding and significant damages. Using a leaking heater can cause water to flood the room, leading to thousands of dollars in repair costs. Act swiftly to prevent further damages and costs.

Why is water coming out of the bottom of my water heater?

​A water heater leaking from the bottom is often due to a faulty or damaged Temperature & Pressure (T&P) valve. This safety feature helps release excess pressure and temperature. When the T&P valve fails, it causes water to leak from the bottom. Regular maintenance can help avoid this issue.

Can a leaking water heater burst?

​A water heater can cause significant damage if it fails. An IBHS study shows most water heater failures start with a slow leak and can lead to a sudden burst, releasing 20 to 80 gallons of water and damaging property. Regular maintenance is crucial.

Should I drain my hot water heater if it is leaking?

​If you find a leak in your water heater, act fast. Turn off the water supply and the heater, then drain the tank. Fix the leak or call a plumber to prevent further damage and costly repairs.

Can I take a shower if my water heater is leaking?

​If your water heater has a minor leak, you can still shower and use hot water but keep it minimal. Seek assistance from a professional plumber and avoid using the heater long term, especially if leaking from the bottom.
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  • Home
  • Services
    • Residential HVAC >
      • AC Repair
      • Heat Pump Repair
      • Furnace Unit Repair
      • Water Heater Repair
      • Plumbing Repair
      • Drain Services and Repair
      • Tankless Water Heater
      • Ductless Mini Split
      • AC Unit Maintenance
      • AC Unit Repair Services 24/7
      • Nest Thermostat
      • Air Quality Service
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      • Professional Commercial AC Services
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  • About Us
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    • Why Choose Us?
  • Near Me
    • Burke, VA
    • Fairfax, VA
    • Springfield, VA
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