Water Heater Leaking From Top: What to Do Now

What It Usually Means

A leak from the top of a water heater typically signals a problem with the temperature and pressure relief valve (TPR valve) or tank corrosion. The TPR valve is a safety feature that releases water when pressure or heat builds up too high.

If the leak is coming from the top side of the tank, it’s often due to a failed TPR valve. If the leak is around the tank, it may be internal corrosion or a loose connection.

Most Likely Causes

• Faulty TPR valve
• Tank corrosion or rust
• Loose or damaged connections
• Excessive water pressure
• Aging water heater (10–15 years old)

Safe Checks You Can Do

1. 1Turn off the water supply and power to the heater.
2. 2Check if the TPR valve is loose or dripping.
3. 3Look for rust or corrosion on the tank.
4. 4Test the water pressure with a gauge (should be under 80 PSI).
5. 5Check if the valve is stuck closed or leaking constantly.

When to Call a Pro

If you see corrosion, a broken TPR valve, or a tank that’s more than 10 years old, it’s time to call a licensed plumber or HVAC technician. Gas water heaters and high-voltage electric heaters require professional handling.

You can also use HomeDependable’s vetting standard to find a trusted contractor. We verify licenses, insurance, and reviews to ensure safety.