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  1. #1
    Join Date
    Apr 2008
    Posts
    11

    copper pin holes under slab

    five year old home with conduit under slab copper line runs through the conduit from outside to interior wall and is getting pin holes in the copper line.we have three a.c. units.all three have been replaced because of pin holes. we live very close to the river(salt water)
    we are on round number two and are fixing to replace the copper line again.

    is there any other material we could use other than copper

  2. #2
    Join Date
    Dec 2007
    Location
    Ohio
    Posts
    2,876
    What exactly is the conduit?? PVC?? I would remove every bit of copper from the conduit and flush it out with a hose for a while...maybe some cleaner as well and get it nice and clean and nice and dry in there. Then after re-running the copper, I would seal that sucker up air tight...foam, silicone, something to make it airtight.
    I need a new signature.....

  3. #3
    Join Date
    Mar 2005
    Location
    Houston, Texas
    Posts
    11,874
    Any way to move the refrigerant lines?

  4. #4
    Join Date
    Apr 2008
    Posts
    11
    the pipe is pvc and there is a total of two pipes two a/cs are in one pipe the third is in the other pipe.we have foamed the pipes in, but cant keep water out.
    is there any other material other than copper that could be used?

  5. #5
    Join Date
    Apr 2008
    Posts
    11
    yes would require a major amount of remodeling

  6. #6
    Join Date
    Mar 2004
    Location
    Grottoes VA
    Posts
    5,856
    Copper only for refrigerant lines.
    Karst means cave. So, I search for caves.

  7. #7
    Join Date
    Mar 2005
    Location
    Houston, Texas
    Posts
    11,874
    Quote Originally Posted by Bill772 View Post
    yes would require a major amount of remodeling
    Any way to post pictures?

  8. #8
    Join Date
    Apr 2008
    Posts
    11
    i cant belive in 2008 there is not another kind of material that can be used for refrigerant line.

  9. #9
    Join Date
    Mar 2005
    Location
    Houston, Texas
    Posts
    11,874
    Quote Originally Posted by Bill772 View Post
    i cant belive in 2008 there is not another kind of material that can be used for refrigerant line.
    Belive it! Copper only.

  10. #10
    Join Date
    Apr 2008
    Posts
    11
    Quote Originally Posted by the dangling wrangler View Post
    Belive it! Copper only.
    do they make a thicker copper pipe that wold not create holes as quick.
    or possibly coated?

  11. #11
    Join Date
    Oct 2003
    Location
    Valdosta Ga
    Posts
    847
    Was that plumbing copper or refrigeration tubbing they used

  12. #12
    Join Date
    Apr 2008
    Posts
    11
    Quote Originally Posted by bzzline View Post
    Was that plumbing copper or refrigeration tubbing they used
    it was installed by a local a/c company,
    but i do not know the answer.

  13. #13
    Join Date
    Dec 2007
    Location
    Afton, VA / Khorat, Thailand
    Posts
    2,469
    Quote Originally Posted by I_bend_metal View Post
    What exactly is the conduit?? PVC?? I would remove every bit of copper from the conduit and flush it out with a hose for a while...maybe some cleaner as well and get it nice and clean and nice and dry in there. Then after re-running the copper, I would seal that sucker up air tight...foam, silicone, something to make it airtight.
    Seems like that would've been done at least after the 2nd time...

    Something sounds fishy...maybe a leak somewhere else. Hard to believe all 3 lines had the same leak under a slab. More than once....?
    Tough times don't last...Tough people do.

    Midnight Sun Astrophotography

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