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Corrosion Cryo-tek in HWBB system

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Drew_2
Drew_2 Member Posts: 158
Don
You should have the fluid tested for both freeze protection and pH. If the freeze protection is low or the pH is below 7.5, change the fluid. It's had a good life. If the pH is on the acid side of the scale expect other corrosion problems to occur in the future.

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  • Docfletcher
    Docfletcher Member Posts: 487
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    Corrosion Ptoential In HWBB System

    I have a system about 12 years old with Cryo-tec installed. I have heard tales of corrosion problems with the use Cryo-tec.
    The Cryo-tec has never been drained,flushed and then fresh Cryo-tec put in.

    Needless to say I don't want any problems. I have 6 zone valves. One of which I had to replace last year.

    Cryo-tec was used because one pipe close to exterior wall in garage. However I think it says warm enough there not to need Crro-tec.

    Any advice you can give appreciated. I am worried about the copper corroding.

    This was a novice install by a friend way back in 95.
  • Docfletcher
    Docfletcher Member Posts: 487
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    Ok, I will do that. Thanks.
  • Docfletcher
    Docfletcher Member Posts: 487
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    I used a soil test kit to get a idea of the PH. Kinda hard to tell with any certainty because the color of the solution never looks anything like the colors on the color chart. Seams to be at PH 7.0 (neutral or slightly higher.)

    I think I'll take mix up 4 ounce of fresh Cryo and water and test again to see the difference in the two samples.

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