Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Navien water heater - Black specks

luckyroy2070
luckyroy2070 Member Posts: 5
in A-C, Heat Pumps & Refrigeration

Hi everyone,

I have purchased brand new house and builder has installed Navien water heater. There are black specks in hot water. Builder’s plumber says it’s nothing in the line and could be hot water heater. Specks smear as well. I have attached pictures. Can someone please let me know if they had similar issue ?

We are so stressed over this it would be great help if someone can help with this. Thank you.

Thank you.

IMG_4146.jpeg
IMG_4318.jpeg
IMG_4319.jpeg
IMG_4317.jpeg

Comments

  • FredoSP
    FredoSP Member Posts: 117
    edited September 12

    Hello,

    How old is this setup? In another post someone mentioned the rubber bladder in the expansion tank could be the issue and starting to fail? Maybe close the shutoff valve and test to see if the black dots still appear? Just remember to open up the valve after testing.

    I really don't like the way the expansion tank is hung. That strap would keep me up at night.

    Exptank.jpg

    Long Island, NY
  • luckyroy2070
    luckyroy2070 Member Posts: 5
    https://forum.heatinghelp.com/discussion/comment/1810264#Comment_1810264

    I purchased brand new house in May, 2024. Manufacturing date on the expansion tank is June, 2023. Can you please let me know Which shut-off valve should I close. is it safe to shut off expansion tank valve while water is on ?

Categories