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Old 11-02-2016, 08:33 AM   #1
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White Crust On PEX Fittings


I noticed white crusty crumbs on top of the newish water heater. I looked up and found this.




Here is what the crumbs of white substance looked like.



The white crumbs are falling off the elbow fittings for the inlet/outlet for the water heater. The house is 10 years old and the water heater is a couple years old, so it is possible it is leaking from work done on the water heater. We just moved in a couple months ago.

I cleaned the white off the one fitting and it looked like this.



From reading online it could be efflorescence from a slow leak, dezincification, or corrosion from excessive flux. Should I get a plumber to come inspect? Any ideas on what this white stuff is?
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Old 11-02-2016, 09:13 AM   #2
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Re: White Crust On PEX Fittings


Looks like there is a definite leak.

Is that a sealed combustion water heater? I usually see that type of oxidation where there is combustion flue gas leakage. It has definitely corrosive properties in the combustion by products.
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Old 11-02-2016, 11:14 AM   #3
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Re: White Crust On PEX Fittings


Either you have very high water pressure, or the connections are leaking.

Either way it needs some attention.

Those are water deposits where there is enough water to be a leak, then the water evaporates, leaving the minerals behind, and it builds up as crystals.


ED
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Old 11-02-2016, 07:10 PM   #4
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Re: White Crust On PEX Fittings


Forced air blower on top of the water heater. Water pressure at the pressure tank is 50psi most of the time. It seemed like too much white stuff to be just flux. Must be a slow leak because there is no water running down to the water heater. Thanks for the info guys. I will get a plumber on the line tomorrow.
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Old 11-03-2016, 07:39 PM   #5
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Re: White Crust On PEX Fittings


Replace the connector from pex to copper. You might have a prime example of Chinese fittings. We had lots of problems with them.
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