Does winterizing rust galvanized pipes?


Old 10-21-18, 02:35 PM
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Does winterizing rust galvanized pipes?

Last year I winterized very old galvanized pipes and in the spring the water ran rust colored when I opened the taps. Should I fill the pipes with anti freeze to reduce air contact? Or am I just losing my mind?
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Old 10-21-18, 03:40 PM
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Rust occurs when Iron, Oxygen and Water combine but do you get more when pipes are drained or filled???

I dont think it's anything I would loose any sleep over trying to resolve, it will all flush out!
Old 10-21-18, 04:39 PM
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Was propylene glycol used to winterize those pipes ?

If so, it probably dissolved years and years worth of mineral deposits on the inside of the pipes.

As a Real Estate Broker, I once sold a house where the Heating Contractor (for a fee of over $500) had fillled the baseboard loop with propylene glycol as well as all of the pipes comprising the potable water supply distribution system.

When it came time to take a water sample for a potability test, I had to run the cold water continuously for about three (3) days in order to obtain a clear sample that the laboratory would accept. Up until the third day, the water looked like chocolate milk . . . . and the testing services here won't accept anything except a "clear" water sample for testing.
Old 10-21-18, 04:52 PM
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Unless it's as bad as Vermont mentioned, usually whenever pipes are turned on/off, it tends to dislodge old crud in the pipes. As long as running for a few minutes clears it out, I wouldn't worry much about it.

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