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Galvanized pipe, why not a good idea?

I've seen it mentioned a few times when someone spots galvanized pipe in a job that it ought to be replaced with regular black steel.  Why is this?



I have an example where the very top venting "antler" setup in my attic was constructed of 3/4 galvanized, and wonder if this is really a big deal to go replace with black steel?



Al
Just a DIY'er trying to learn, and improve and maintain his converted ca 1929 overhead gravity hot water system since there is no one local that can.

Comments

  • Ron Jr._3
    Ron Jr._3 Member Posts: 603
    Not sure

    what you mean by " venting antler setup " , but if it's a closed hot water system , I don't see the harm in having galvanized piping .
  • Al,,,,,

    I cannot see any reason,,,, leave-it be.
  • Al Roethlisberger
    Al Roethlisberger Member Posts: 194
    edited November 2009
    Thanks.

    Yes, it is closed hot-water.



    Thanks  :)



    Al
    Just a DIY'er trying to learn, and improve and maintain his converted ca 1929 overhead gravity hot water system since there is no one local that can.
  • hot_rod
    hot_rod Member Posts: 21,878
    galvi is a no no

    with glycol, but should be fine on HW.



    Even on a closed loop hydronic I would keep copper and galvi separated by brass or bronze, they seem to not get along well when they butt heads.



    hr.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
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