Leaking Water Heater: What to Know and How to Fix It

A hot water heater leak is among the most aggravating plumbing problems that can happen to a homeowner. Not only can it cut into your hot water supply, but it can also lead to significant damage to your floors, walls, and foundation if it goes undetected. If your water heater is leaking at the bottom, leaking from the top, or you are experiencing a hot water leak around your tank, Heat Busters Inc. is here to assist.

We proudly serve the entire San Diego County area with quick, professional water heater repair and emergency plumbing services. Call us today at (619) 554-0745 to let us stop the leak before it turns into a flood.

Common Indications of a Leaking Water Heater

Most leaks are small at first and may not be noticed for weeks—or even days. Look for the following:

  • Puddles of water under or near your tank
  • Rusty water or discolored hot water
  • A dripping sound coming from the unit
  • Inconsistent water temperature
  • Damp or moldy smell in the utility room
  • Sudden increase in your water bill

If you notice any of these signs, it’s important to investigate immediately. A hot water heater leaking isn’t just an inconvenience—it’s a hazard that needs quick attention.

Why Is My Water Heater Leaking?

So, why is your water heater leaking? There are a few common reasons:

  • Loose Drain Valve: The drain valve at the bottom of the tank can become loose over time. This is a minor issue that often causes a water heater dripping or slow leak.
  • Corroded Tank: If your unit is older, corrosion is likely eroding the internal lining. As rust compromises the integrity of the metal, it causes pinhole leaks that get progressively worse over time.
  • Defective Temperature & Pressure Relief Valve: This safety valve opens to drain pressure. If it’s faulty or clogged, it can drip continuously or permit water leaking from the water heater.
  • High Water Pressure: If your home’s water pressure is too high, it can stress your tank and fittings, eventually leading to leaks.
  • Cracked Tank Liner: In electric or gas models, cycling between heating and cooling repeatedly may create expansion and contraction that will ultimately crack the glass liner, resulting in a hot water leak.

Water Heater Is Leaking at the Bottom – What Now?

When a water heater is leaking at the bottom, it often indicates one of two things:

  • A leaky drain valve, which can be tightened or replaced
  • A ruptured tank, which typically means the water heater must be replaced

The best course of action? Shut off the power and water supply to the heater and call Heat Busters Inc. right away at (619) 554-0745. Our licensed plumbers can assess the damage and perform expert water heater repair in San Diego.

How to Turn Off a Leaking Water Heater

If you discover a leak, follow these steps immediately:

  1. Shut off the power
    • Electric heater: Flip the breaker.
    • Gas heater: Turn the gas valve to “OFF.” 
  2. Turn off the water supply
    • Locate the cold water shut-off valve (usually on top of the unit) and turn it clockwise. 
  3. Drain the tank (if safe)
    • Connect a garden hose to the drain valve and open it to prevent flooding. 
  4. Call an emergency plumber in San Diego
    • Time is critical when dealing with hot water leaking. Call Heat Busters Inc. for immediate help.

Can a Leaking Water Heater Be Repaired?

Yes—depending on the reason. Most problems such as bad valves or fittings can be fixed without having to replace the unit. If the tank itself, however, is corroded or cracked, then a complete replacement might be necessary.

Our plumbers provide honest diagnosis and will always suggest the most cost-effective and long-term solution. We work on all kinds of heaters—gas, electric, and tankless.

When to Call a Professional Plumber 

Don’t wait for the leak to worsen. You should call Heat Busters Inc. if:

  • The tank is over 10 years old
  • You hear gurgling, hissing, or popping
  • Water is actively leaking from the base
  • You’ve noticed rust in your hot water
  • You’re unsure where the leak is coming from

We provide quick and affordable water heater repair in San Diego, and our qualified plumbers are available for emergency plumbing from Monday through Saturday. 

Emergency Plumber in San Diego – Quick Response

A water heater leak can turn into a plumbing emergency in a hurry, particularly if it floods or harms your property. If you’re in need of an emergency plumber San Diego, you’ve come to the right place. At Heat Busters Inc., we specialize in:

We’re honored to be a reputable local plumbing company with years of experience and five-star service throughout San Diego County, including Poway, Carlsbad, El Cajon, Pacific Beach, and Escondido and surrounding areas. 

Want to Prevent Future Leaks?

Here are some maintenance tips to prevent water heater leaking water in the future:

  • Flush your tank annually to remove sediment buildup
  • Test the pressure relief valve regularly
  • Inspect fittings and connections every few months
  • Install a leak detection system with automatic shutoff
  • Replace old units before they fail (usually after 8–12 years)

Routine maintenance goes a long way in avoiding a surprise hot water heater leaking situation.

Call Us for Trusted Water Heater Repair in San Diego

A leaking water heater isn’t something you can afford to ignore. Whether the leak is small or severe, trust the licensed professionals at Heat Busters Inc. to respond quickly and repair it the right way. Call us today at (619) 554-0745 or book your water heater repair service online to get expert help fast.

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