drain saddle for 1 1/4" metal tailpiece

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by jag_man653, Sep 8, 2009.

  1. jag_man653

    jag_man653 New Member

    Messages:
    26
    The kit for my RO system has a saddle tap for the standard PVC drain. It is too big for my 1 1/4" OD metal Kohler tailpiece for the washbasin. Where can I find a drain saddle of the right size? Google turns up dozens of hits for RO system sellers, all of which sell the same drain saddle.
  2. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    You might have to improvise, as RO systems are almost always installed in the kitchen, not under the lav.
  3. Gary Swart

    Gary Swart In the Trades

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    Location:
    Yakima WA
    Saddle taps are notoriously troublesome sooner or later. The usual complaints are when they are used to tap into a cold water supply line for an ice maker, and for them the best solution is a tee in the supply line then into a ball valve and adapters to the ice maker supply line. I would think a similar solution would be appropriate here as well.
  4. SewerRatz

    SewerRatz Illinois Licensed Plumber

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    1,705
    Location:
    Chicago, IL
    Also most plumbing codes do not allow for saddle connections.
  5. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,540
    Location:
    Cave Creek, Arizona
    drain

    Get a 1 1/4" threaded branch tailpiece, used for air conditioner drains, for the drain. Connect the r/o drain to the branch opening with a dishwasher to disposer fitting and a reducer.
  6. jag_man653

    jag_man653 New Member

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    26
    It's in the drain, not the supply.
  7. jag_man653

    jag_man653 New Member

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    26
    Thanks, Jimbo. Thinking about using a piece of rubber gasket sheet about 1/8" on each side of the clamp in addition to the little rubber seal that came with the saddle. What do you think?

    Ed
  8. jag_man653

    jag_man653 New Member

    Messages:
    26
    Thanks. Didn't know the proper name till now. A Google found several online sources, but I may call a good plumbing store in my area if I decide to go this route. First, I'll try padding the 1 1/2 saddle with some thick rubber gasket sheet. Nothing to lose.

    BTW, how would I get from the 3/8" poly tube to the 3/4" branch on the tailpiece?

    Ed
  9. jag_man653

    jag_man653 New Member

    Messages:
    26
    Even on a drain?
  10. hj

    hj Moderator & Master Plumber Staff Member

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    Location:
    Cave Creek, Arizona
    saddle

    Padding the saddle would not be the best idea you ever had. There are many ways to increase the 3/8" drain up to the 1/2" copper tubing size of the dishwasher boot/adapter.
  11. jag_man653

    jag_man653 New Member

    Messages:
    26
    Probably because I'm not as familiar with plumbing hardware as you, I can't think of a good one. No doubt I could cobble something together, starting with a 3/8 to 3/4 compression fitting, if there is such a thing exists, a short length of 3/4 copper tubing, and a short length of rubber hose. Or, I could simply ask for a better idea from this forum.

    One aversion to this whole approach, however, is I had a devil of a time getting the tailpiece to seal when I installed it several years ago. Finally had to uses thread sealer to stop the drip, so it may be hard to get apart.
  12. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,540
    Location:
    Cave Creek, Arizona
    connection

    I would use a sweat 1/2 x 3/8" o.d. reducer with a short piece of 1/2 copper into the "boot" and a short piece of 3/8" o.d. tubing with a 3/8" coupling to the RO drain.
  13. jag_man653

    jag_man653 New Member

    Messages:
    26
    Went to a really good plumping store today. Turns out the branched tailpiece is 3/4" at the branch. To get down to my 3/8" poly tube the counterman proposed a multidiameter rubber boot, 3/4 at the big end and 1/2" at the smaller end. Then he shoved a 3/8" compression fitting with a pipe thread of about 1/2" OD (perhaps 3/8 pipe?) into the boot. Both of us got a chuckle out of it. He said he wouldn't want it under his basin and I agreed.

    Then he got out his PIP (Precision Installation Parts?) catalog and found a 1 1/4" saddle with 3/8" JG or compression fitting. Unfortunately, when he called PIP they didn't have it in stock. Don't know if it had been dropped or what. PIP did come up with a solution though: a saddle made like a hose clamp rather than the more common 2-piece plastic saddle. It is adjustable from 1 1/4 to 2". I ordered one for $8. It will take about a week to get it. I'll report back to tell how it works.

    I realize the pros here don't like saddles. I agree 100% for the supply tap things, but for a drain like this I really don't see what the problem is. I have had one on my kitchen sink for well almost 14 years without a problem of any kind. I blocked it off when I went to an RO faucet without an air gap, necessitating a dishwasher air gap with a second branch for the RO. I really like it much better, but that old saddle is still on the drain pipe with no sighs of leakage.

    Ed
  14. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,540
    Location:
    Cave Creek, Arizona
    drain

    You were overly sensitive to what the tailpiece would have looked like, and I would not have any compuction against using it. Saddles are bad for pressure pipes and major drain connections, not R/O drains. It appears you are describing something like a swimming pool pipe saddle, and THAT I would not use under your sink.
  15. jag_man653

    jag_man653 New Member

    Messages:
    26

    Thanks, Hj.

    I doubt the tailpiece he showed me was for a swimming pool. It was on the rack amongst plumbing for residential bathrooms and kitchens. It was pretty muvh as you described, and photos I found online.

    It wasn't so much the uglyness ans it was the size. The whole thing stuck out about 6-7" from the tailpiece, and things are pretty tight under there. Somebody ought to sell these systems sized for bathrooms.

    I share your assessment about the saddles. For one thing, a supply tap is going to have 40-50 psi at the joint, wheres a drain has zero.

    Again, thanks for the help. I need someone to talk to about these things, rahter than stumbling around. I do appreciate it. It's a great forum, and I will bookmark it.

    Ed
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