Why is My Water Heater Leaking Water? What to do


Water heaters are a cornerstone of modern comfort, responsible for providing hot water for showers, dishes, and laundry. However, discovering a leak in your water heater can be a source of stress and confusion. This guide aims to demystify the reasons behind water heater leaks and provide clear, actionable advice on what to do if you encounter this problem.

Understanding Your Water Heater

Types of Water Heaters

There are primarily two types of water heaters found in homes: tankless and tank models. Tankless water heaters heat water on demand using high-powered burners, while traditional tank models store and continuously heat water in a large tank.

Common Components

Key components of a water heater include the water tank (or heating unit in tankless models), heating elements (gas or electric), thermostat, drain valve, pressure relief valve, and water supply pipes.

Lifespan and Maintenance Needs

The average lifespan of a water heater is about 8 to 12 years, which can be extended with regular maintenance such as annual flushing of the tank, checking the anode rod, and inspecting the pressure relief valve.

Identifying the Source of the Leak

Initial Steps for Inspection

Before inspecting your water heater, ensure safety by turning off the power at the circuit breaker for electric heaters or the gas supply for gas heaters. Also, shut off the water supply to prevent further leakage.

Top Causes of Water Heater Leaks

  • Faulty Temperature and Pressure Relief Valve: If this valve malfunctions or is set too high, it can release water as a safety measure.
  • Loose Drain Valve: Over time, the drain valve can loosen, causing water to drip from it.
  • Excessive Pressure: If the water pressure in your home is too high, it can force water to leak out of the water heater.
  • Corrosion and Sediment Buildup: Sediment accumulating in the tank can cause corrosion and small cracks.
  • Inlet and Outlet Connections: Check these connections for looseness or corrosion.

DIY Fixes for Common Issues

Tools and Materials Needed

Prepare with basic tools like a wrench, pliers, Teflon tape, and replacement parts like washers or valves.

Step-by-Step Repair Guides

  • Tightening Loose Fittings: Use a wrench to gently tighten any loose fittings around the inlet and outlet pipes.
  • Replacing a Faulty Pressure Relief Valve: Purchase a compatible valve, remove the old one, and install the new valve using Teflon tape to secure the threads.
  • Flushing the Tank: Annually flush the tank to remove sediment, which involves attaching a garden hose to the drain valve and draining the water away from the home.
  • Applying Sealant for Minor Leaks: For minor leaks around fittings, applying plumbing epoxy can temporarily solve the issue.

When to Call a Professional

For significant leaks, tank damage, or if you are unsure about performing repairs, it is prudent to call a licensed plumber.

Preventative Measures

Regular Maintenance Tips

Regularly check and replace the anode rod every few years, maintain proper water pressure, and ensure the thermostat is set at an appropriate level (usually around 120-130°F).

Annual Inspection Checklist

Create a yearly routine to inspect the water heater for signs of wear, leaks, and corrosion.

Understanding Costs

Cost Comparison

DIY repairs can save money upfront, but incorrect repairs can lead to more significant issues. Professional repairs might cost more but offer peace of mind and warranties.

Legal and Insurance Considerations

Home Insurance

Some insurance policies cover water damage from leaking appliances, including water heaters. Check your policy for specifics.


Dealing with a leaking water heater can be daunting, but understanding the common causes and solutions can empower you to address the issue effectively. Regular maintenance and timely repairs are your best defenses against unexpected leaks.

Have you experienced issues with your water heater? contact us for professional advice and service options.

FAQ Section

Q: How long does a water heater repair take? A: Simple repairs might take a few hours, while replacing the water heater can take a day or more.

Q: Can a leaking water heater explode? A: While rare, excessive pressure build-up without relief can lead to a burst or explosion. Regular maintenance is crucial.