This one needs a licensed pro
Likely cause: a loose or corroded pipe connection
Water at the fittings on top of the heater usually comes from connections loosened by heat cycles and wear. Have a plumber reseal them.
Why this happens
A. O. Smith lists loose pipe connections, from thermal expansion and wear, as a common source of water heater leaks. Rheem's leak check is to inspect the threads at the pipe nipples, drain valve, elements, gas valve and relief valve with a flashlight. Water that starts at the top can run down the side and pool at the base, so trace it upward.
What to do right now
- Dry the top of the heater and use a flashlight to find exactly which fitting is wet.
- Put a pan or towels under the heater.
- If it is more than a slow drip, turn off the power or gas and close the cold water supply, as A. O. Smith advises. Home Depot also says to turn off the power to the heater if you turn off the water.
- Call a licensed plumber.
What to tell the plumber
- Which fitting on top of the heater is leaking, with a photo if you can.
- Whether it drips or sprays.
- Gas or electric, and the heater's age.
Build the full list: what to tell the plumber.
Start this troubleshooter over
References (every fact above comes from one of these pages)
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