What is this loop under my kitchen sink? RO Feed to Fridge?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by stupid48, May 21, 2014.

  1. stupid48

    stupid48 New Member

    Joined:
    Nov 9, 2011
    Location:
    NV
    Hi there,

    I'm going to be moving a couple of plumbing stubs to move my kitchen sink cabinet. Under the sink, there is a copper pipe than comes out of the wall and goes back in. I'm assuming it has something to do with the water supply behind the fridge but I'm only guessing. Come someone suggest what this is?

    [​IMG]


    Thanks, Chris
     
    Last edited by a moderator: May 22, 2014
    flapper likes this.
  2. Gary Swart

    Gary Swart In the Trades

    Joined:
    Sep 1, 2004
    Location:
    Yakima WA
    Very unusual for sure. Here's my guess FWIW. I suspect there is a stud behind the loop and perhaps the installer couldn't figure how to drill a hole for the pipe so he just went around the stud. Maybe 2 or 3 studs sistered together making drilling difficult. I don't see how it would have anything to do with the ice maker. That line should tap off a supply line in plain sight. But, who knows when a DIY has hacked his plumbing what you may run into. When you finally discover what it really is, report back.
     
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  4. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    It is the water feed to the refrigerator. It was done that way so if you installed an RO drinking water system, it could be connected to the icemaker/water connection.
     
  5. stupid48

    stupid48 New Member

    Joined:
    Nov 9, 2011
    Location:
    NV
    Thanks. That's kind of what I figured....... I just thought it was strange because the house was built in 1998 so I was surprised that the builder would stub out for that...Seems like a more modern thing to me...
     
  6. MikeQ

    MikeQ Member

    Joined:
    Jul 17, 2012
    Location:
    Washington
    No, that's a plumber's grab handle, installed to make it easier for the plumber to position his body for those difficult under-sink repairs.

    And with it's textured grip surface, one of the more deluxe ones I've seen.
     
  7. stupid48

    stupid48 New Member

    Joined:
    Nov 9, 2011
    Location:
    NV
    hehe. thanks for the humor... :eek:
     
  8. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    In most cases it is the plumber's decision to do it, not the builder. I have never had a builder as me to do it.
     
  9. Tase15

    Tase15 New Member

    Joined:
    Jun 19, 2016
    Location:
    Nevada
    I have this same connection under my sink. Which side do I cap and which side can I install my RO unit to?
     
  10. Tase15

    Tase15 New Member

    Joined:
    Jun 19, 2016
    Location:
    Nevada
    How would I know which side to cap and which side to install my RO unit to?
     
  11. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    If it was known to be the supply to the fridge, I would guess that was a provision to let you install an under-sink filter inline. One problem with that is that if that filter is a reverse osmosis filter, you should run plastic pipe to the fridge rather than copper.

    I am not a plumber. Just speculating.
     
  12. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Joined:
    Sep 2, 2004
    Occupation:
    Retired Systems engineer for defense industry.
    Location:
    New England
    Cut enough of a section out of the pipe to add what you want...have someone momentarily turn the water back on...it will become obvious which side is the supply!
     
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