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Agentis Plumbing Blog

Water Leaking from the Top of Your Water Heater?

Posted by Agentis on Sep 29, 2017 1:23:08 PM

A leak from the top of your water heater may be less serious than one from the bottom. 

Before you diagnose the problem, the first order of business should be to shut off the gas or electrical circuit that powers the water heater. 

Don’t turn off the cold water just yet, as certain leaks can stop themselves without much pressure.


Is it time to replace your water heater?

Finding the water heater leak

Once the water heater is cool enough to touch, you can take a visual check and take your hand and run it over different pipes and joints to help you determine where the leak located.

You can also use a paper towel and wrap it around the pipes and joints to find any damp or wet spots. 

Diagnosing the cause of the leak

Now that you know the location of the leak, you can start to diagnose the cause. 

Here are some of the most likely causes of a leak at the top of your water heater:

Leaking valve:

Most likely it is either a ball valve or in-line valve. If the valve happens to be the source of the leak, you can tighten the nut securing the handle.

Leaking pressure relief valve:

This is a safety valve that is used in the event of over-pressurization. If this is the source of the leak you will likely need to replace it.

Leaking joint:

This may be caused by a connecting pipe going into the water heater. If it’s a threaded pipe, it’s a relatively easy fix for your local plumber. 

Need help with a water heater leak? The experts at Agentis are happy to help.


Water Heater Special

Topics: Water Heater, Replace water heater


As a second generation family owned business, Agentis Plumbing has served Allentown, Bethlehem, Easton and the entire Lehigh Valley since 1954. Through our family-owned and operated full-service plumbing and drain cleaning Mr. Rooter franchise, we offer courteous and prompt service by fully uniformed, skilled technicians, providing emergency plumbing services with no extra charge for nights, weekend, or holidays.

Don’t just take our word for it. Here’s what our customers have to say — agentisplumbing.com/about/testimonials.

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