Water Heater Leaks: When to Repair vs. Replace

A water heater leak can cause significant damage if not addressed promptly. Even a small leak can lead to water damage, mold growth, and costly repairs. But how do you know if you should repair the leak or replace the water heater entirely? In this guide, we'll cover common causes of water heater leaks and explain when to repair versus replace.

Common Causes of Water Heater Leaks

Water heater leaks can occur for various reasons. Identifying the source of the leak helps determine if a repair is feasible or if replacement is necessary.

1. Leaking Temperature & Pressure Relief (TPR) Valve

The TPR valve is a crucial safety feature that prevents the tank from exploding by releasing excess pressure.

Signs of a TPR Valve Leak:

Water dripping from the TPR valve pipe.
The valve hisses or releases steam intermittently.
The leak intensifies when the water is heating.

Can It Be Repaired?

Yes! If the valve is leaking due to excess pressure, a plumber can adjust the water temperature or pressure.
Yes! If the valve is faulty, it can be replaced.
No. If the leak is caused by excessive tank pressure, the underlying issue must be addressed.

2. Loose Drain Valve

The drain valve at the bottom of the tank is used for flushing sediment buildup. If it's leaking, it could be loose or damaged.

Signs of a Drain Valve Leak:

Water dripping from the spout at the bottom of the tank.
Water pooling near the base of the heater.

Can It Be Repaired?

Yes! If the valve is loose, it can often be tightened.
Yes! If the valve is damaged, it can be replaced.
No. If the leak is caused by corrosion in the tank, replacement is needed.

3. Tank Corrosion & Internal Rust

Corrosion inside the tank typically happens when the anode rod (designed to prevent rust) wears out, leading to leaks.

Signs of a Corroded Tank:

Rusty or discolored water.
Visible rust spots on the tank exterior.
A slow, persistent leak from the bottom of the heater.

Can It Be Repaired?

No. A corroded tank means the structural integrity of the heater is compromised.
Replacement is the only option when the tank itself is leaking.

4. Sediment Buildup Causing Overheating

Hard water minerals settle at the bottom of the tank over time, forming sediment buildup. This can lead to overheating, increasing pressure inside the tank, and causing leaks.

Signs of Sediment Buildup:

Banging or popping sounds when the heater is on.
Water takes longer to heat.
Small leaks appear near the bottom of the tank.

Can It Be Repaired?

Yes! Flushing the water heater annually can remove sediment buildup and prevent leaks.
No. If the tank has been damaged, replacement is necessary.

When to Repair vs. Replace a Leaking Water Heater

Repairs Are Possible If:

The TPR valve or drain valve is leaking.
Loose pipe connections that can be tightened.
Minor performance issues caused by sediment buildup.

Replacement Is Necessary If:

The tank itself is leaking due to corrosion.
The heater is over 10-12 years old and has repeated issues.
The leak has caused significant water damage.

How to Prevent Future Water Heater Leaks

Prevent leaks and extend the lifespan of your water heater with these maintenance tips:

Flush the tank annually to remove sediment buildup.
Inspect the anode rod every 1-2 years and replace it when necessary.
Check the TPR valve regularly to ensure proper function.
Monitor for rust or corrosion on the tank before leaks start.

Don't Ignore a Leaking Water Heater—Call a Professional!

A small leak today can lead to a major flood tomorrow. If your water heater is leaking, don't wait—call a professional plumber for repair or replacement services.

📞 Call us at 385-308-5384 for fast, reliable water heater services in Midvale & West Jordan, Utah.

🚿 We’ll help you decide whether to repair or replace your water heater so you can enjoy reliable hot water again!