Why is My Water Heater Leaking? 5 Common Causes

A hot shower on a cold day, a sink full of steaming water for washing dishes – these are just a few of the comforts a well-functioning water heater provides. But when a water heater leaking disrupts your life, it’s inconvenient and can lead to costly water damage. This blog is your one-stop guide to understanding the most common causes of water heater leaks, empowering you to identify the problem and take the necessary steps to restore your hot water and peace of mind.

Signs of Water Heater Leaking

While a functioning water heater plays a vital role in our daily lives, a water heater leaking can quickly turn into a major inconvenience and even cause costly water damage. Being attentive to the following signs is crucial to identify and address a leak promptly.

Visible Water:

• Around the base of the water heater: This is a common sign of a water heater leaking, especially if the water appears rusty or discolored.
• On the floor near the water heater: This can indicate a leak from the tank itself, connections, or the drain valve.
• Dripping from the water heater itself: This points towards loose connections, a faulty T&P valve, or a failing anode rod (in rare cases).

Unusual Sounds:

• Hissing or popping noises: These can be signs of a malfunctioning T&P valve, which requires immediate attention.
• Knocking or banging sounds: These might indicate sediment buildup in the tank, potentially leading to leaks in the future.

Changes in Water Performance:

• Fluctuations in hot water temperature: This could be due to various issues, including leaks, and necessitates further investigation.
• Sudden decrease in hot water availability: This can indicate a significant leak or a failing water heater.

Other Warning Signs:

• High water bills: Unexplained spikes in water usage can sometimes be a sign of a hidden leak.
• Rust-colored water: This can be caused by internal corrosion in the tank, potentially leading to leaks in the future.

Don’t ignore these signs! If you suspect your water heater is leaking, it’s crucial to act promptly. Shut off the water supply and energy source (gas or electric) to the water heater, and call a qualified plumber to diagnose the issue and prevent potential water damage.

5 Common Causes of Water Heater Leaks

Let’s delve into the most common reasons behind a water heater leaking:

Leaks from the Top

1. Loose or faulty connections

These leaks often occur where pipes connect to the top of the water heater. Over time, connections can loosen due to normal wear and tear, thermal expansion, or improper installation. This creates a pathway for water to escape, typically dripping down the sides of the heater.

2. Faulty Temperature and Pressure (T&P) valve

This crucial safety valve is designed to release pressure and prevent the tank from exploding if the temperature or pressure inside gets too high. A malfunctioning T&P valve can leak due to a faulty seal, worn components, or debris build-up. If you notice a steady stream of water coming from the T&P valve, it requires immediate attention from a qualified plumber.

3. Worn-out anode rod

This sacrificial element attracts corrosion within the tank, protecting the actual tank from rust and deterioration. However, as the anode rod ages, it can deteriorate and no longer effectively protect the tank. In rare cases, this can lead to leaks from the top of the tank, near the location of the anode rod.

Leaks from the Bottom:

4. Leaking drain valve

The drain valve allows you to drain the water heater for maintenance or repairs. A faulty drain valve, with a worn-out gasket or a loose connection, can leak from the base of the heater. This is usually a relatively easy fix, often requiring tightening the valve or replacing the gasket.

5. Cracked or corroded water heater tank

Unfortunately, this is the most serious cause of leaks and often indicates the end of a water heater’s lifespan. Over time, the tank can develop cracks due to age, mineral build-up, or excessive pressure. Corrosion from within the tank can also weaken its integrity, leading to leaks. If you suspect a cracked or corroded tank, it’s crucial to call a professional plumber immediately to assess the situation and discuss replacement options.

What to Do When You Discover a Water Heater Leaking

1. Shut off the water supply

The first and most crucial step is to stop the leak at its source. Locate the cold water shut-off valve, typically located near the top of your water heater. It might be a lever handle that needs to be turned clockwise or a knob that needs to be pulled out perpendicular to the pipe. Turn the valve firmly until it stops, preventing further water flow into the heater.

2. Turn off the gas or electric supply (if applicable)

Safety is paramount. For gas water heaters, locate the gas control valve on the gas line leading to the heater. Turn the knob or lever quarter-turn clockwise to the “off” position. If you smell gas or are unsure about handling the gas supply, do not attempt to turn it off yourself. Immediately evacuate the house and call the gas company or emergency services.

For electric water heaters, locate the breaker in your electrical panel labeled for the water heater. Turn the breaker off to the “off” position, cutting off power to the unit.

3. Call a qualified plumber

Once you’ve safely shut off the water and energy supply, it’s crucial to call a licensed and insured plumber to diagnose the leak and determine the necessary repairs or replacements. They have the expertise and tools to address the issue effectively and ensure your water heater operates safely and efficiently. Don’t attempt to fix a major leak yourself, as it could worsen the problem and pose safety risks.

Don’t Let Leaks Spring a Surprise

A water heater leaking can disrupt your day and cause significant problems if left unaddressed. Identifying the source of the leak is crucial to prevent:

• Increased water bills: Leaky water translates to wasted money on your utility bill.
• Water damage: A small leak can quickly escalate, damaging your floors, walls, and belongings.
• Mold growth: Leaking water creates a damp environment perfect for mold growth, posing health risks and requiring expensive remediation.

While this blog has equipped you with knowledge about common signs and causes of a water heater leaking, remember that professional help is essential for accurate diagnosis and safe repairs.

Landa Plumbing has a team of experienced and licensed plumbers ready to address all your water heater concerns. They can swiftly identify the leak’s source, recommend the best solution, and ensure your water heater is repaired or replaced efficiently and safely.

Don’t let a water heater leaking turn into a major inconvenience. Contact Landa Plumbing today for prompt, reliable, and professional service, and get your hot water flowing again in no time.