Best Way to Splice Water Off This Sink

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by shanec, Jan 5, 2017.

  1. shanec

    shanec New Member

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    Jan 5, 2017
    Location:
    Illinois
    I am trying to plumb a coffee machine off the cold water underneath my kitchen sink. What is the easiest way to plumb this in without having to do any soldering? I am planning to run a 3/8" PEX (John Guest) tube from this source line to the espresso machine. Should I replace the stop valve at the point labeled "A" with a two outlet stop valve and plumb the PEX tube directly into it with a stainless steel compression insert stiffener? Should I cut the pipe at point "C" and use a Sharkbite slip tee adapter that I connect the 3/8" PEX to (adding a valve in the PEX pathway immediately after that connection)? Is there a better way?

    IMG_2122.JPG
     
  2. CountryBumkin

    CountryBumkin Active Member

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    Orlando, FL
    Easiest: I would add a "compression tee fitting" at B. That's easiest and you don't need to shutoff water to house (just turn off the line with stop valve A).
     
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  4. shanec

    shanec New Member

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    I thought about that, but I was worried that the bend in the copper pipe would make it a little harder to add the compression tee and would make it a little more susceptible to leaks. I assume there is not really much flexibility in that copper pipe, so would need to disconnect that current coupling, cut away some of the current copper pipe (how do I know the exact amount?), and then connect the compression tee. Is that correct?
     
  5. CountryBumkin

    CountryBumkin Active Member

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    That copper will move without any problem. You only need about 2 inches of space to insert a brass tee.
     
  6. asktom

    asktom Member

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    Nov 9, 2009
    Location:
    Victor, MT
    There is also a fitting that would fit the outlet side of the angle stop, tee out the side and let you hook up the faucet on the top. The one I have part numbers for is from Lasco. If you want 1/4" compression out the side it is 06-9101. If you want 3/8" compression out the side it is 06-9111. Lasco calls it an "angle stop tee", but I have seen them from other sources called an "add-a-tee". This is the easiest hook up, but it means the angle stop will control both the faucet and the coffee machine.
     
  7. shanec

    shanec New Member

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    Jan 5, 2017
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    Illinois
    I finally got around to starting work on this project. I have run my 3/8" John Guest tubing and now I just need to connect everything together. My plumbing kit came with the 3/8" max adapter compression tee (shown below) that should fit perfectly. I disconnected the existing compression fitting at point A (in the original picture), but I can't seem to bend the copper pipe enough to connect it to the top of the installed max adapter. Would it be easier to do this at point B? Am I going to need to cut 1.5" off the copper pipe between A and B and redo the compression fitting? Any suggestions would be appreciated!

    IMG_2312.JPG
     
  8. dj2

    dj2 In the Trades

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    Location:
    California
    Replace the angle stop with a 3 way compression angle stop and you'll have an outlet for the coffee maker.

    I would install an inline filter for the coffee maker.
     
  9. shanec

    shanec New Member

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    Illinois
    Would another, potentially easier, option be to use a 3/8" self-tapping saddle valve between A and B so I don't need to do any cutting or even shut off the water main to replace the angle stop valve?
     
  10. dj2

    dj2 In the Trades

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    Location:
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    Saddle valves are not as dependable and seem to wear out and leak faster.
    The way I suggested above, there are no cutting, piercing or soldering.
     
  11. plumber69

    plumber69 In the Trades

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    Prince Rupert, British Columbia
    If it's your house saddle tees are cheap and easy to install. If it leaks 5 years from now replace it with another saddle valve
     
  12. shanec

    shanec New Member

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    Jan 5, 2017
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    Illinois
    This may be a ridiculous question, but where do I find one of these? I looked at the local Home Depot with no luck. My searches online haven't returned what I need either. Most of these look like valves that would be used for a toilet and are stainless instead of brass. Am I just searching for the wrong terms?

    I do plan to place a few stop valves, a check valve, a water softener and a carbon filter before the espresso machine.
     
    Last edited by a moderator: Feb 25, 2017
  13. Reach4

    Reach4 Well-Known Member

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  14. shanec

    shanec New Member

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    Jan 5, 2017
    Location:
    Illinois
    Thank you very much! The one below looks exactly like what I need and it should be available at a local Home Depot. I guess I just didn't really know what to look for the first time.

    http://www.homedepot.com/p/BrassCra...utlet-Multi-Turn-Valve-CR1901LRX-R1/202047052

    I believe I can connect the John Guest PEX tubing directly to one of the 3/8" outlets on that stop valve, right? If my research is correct, it appears that I also need to add some kind of internal sleeve inside the PEX tubing to hold its shape with the compression fitting. Is that correct? Any idea of the technical name for those sleeves so I can find them a little quicker?
     
  15. shanec

    shanec New Member

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    Illinois
    I think I answered my own question. For those who come across this in the future, here are the likely parts needed.

    http://m.homedepot.com/p/Sioux-Chief-3-8-in-Brass-Compression-Nut-with-Insert-909-071001/100637874

    http://m.homedepot.com/p/Sioux-Chie...ompression-Sleeve-3-Pack-907-021003/100637962
     
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