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Comments for What are the blue flakes coming out of the water heater?

    • It’s not MADE of glass, it’s LINED with glass on the inside, to help protect the tank from the corrosion caused by hot water. Many if not most hot water heaters are advertised as “glass lined”

  • I had blue “flakes” – some the size of a dime, coming out of my old heater, too. Ended up replacing the whole thing – was concerned it would have a catastrophic failure when we were travelling someplace inconvenient. It was the glass lining coming off – tank was pretty much “toast” – service tech said it was just about ready to split when he got it out, so glad I replaced it when I did! ST

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