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ph level of antifreeze system

[Deleted User]
[Deleted User] Posts: 0
in THE MAIN WALL
for the fliud in a propelyne glycol added radiant system?i think i butchered the spelling of that.

Comments

  • hr
    hr Member Posts: 6,106
    Close enough

    Dow suggest 8.0-10.0 New Dowfrost HD properly blended with good water at 50% will read 9.0-10.7 A ph tester or narrow range ph paper can be used to test.

    Some manufactures recommend replacing the fluid if it falls below 7 ph. Personally if it hasn't been "cooked" (you'll know by the smell and color!) you can buy a boost product to bring it back up.

    In the 6's or lower I would definitely flush, clean, and replace the fluid.

    The ph is the indicator for the condition of the inhibitors, watch it closely. Yearly if possible on residential systems.

    hot rod

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