Polyethelene tubing adapter for Water Softener drain

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Kevin121, Mar 7, 2021.

  1. Kevin121

    Kevin121 Member

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    I am looking to run Polyethelene tubing for a water softener drain. The Softener has a 3/4" Male NPT plastic connection and can use either 5/8" OD or 3/4" NPT. I am wondering what type of fitting I need to install at the drain connection to run the Polyethene tubing? What size tubing would you recommend to go with this? Thanks in advance!
     
  2. Jeff H Young

    Jeff H Young In the Trades

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    Actually I like CPVC for the drain looks nice and straight lays down well and doesn't react with the waste. I think 1/2 inch (5/8 od ) works good.
    Should you stay with your choice a push fit or compression fitting should work
     
    Last edited: Mar 7, 2021
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  4. Kevin121

    Kevin121 Member

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    This is more of a temporary location where I am draining it for now, that is what I was looking to use the flexible Polyethlene tubing instead...
     
  5. Bannerman

    Bannerman Well-Known Member

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    • What is the water softener Capacity?
    • What is the drain line run distance?
    • Will the drain line run up overhead or will it be run at a height that is equal to or below the height of the softener's drain connection?
     
  6. Kevin121

    Kevin121 Member

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    The softener capacity is 30,300 grains, the temporary drain line now will be about 25 feet and will run vertically about 5 feet. I'm just struggling finding a fitting with a female 3/4" NPT end and barbed 1/2" (ID) end. My understanding is that the ID on the tubing needs to match the size of the barbs on the drawing fitting...
     
  7. Reach4

    Reach4 Well-Known Member

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    Last edited: Mar 7, 2021
  8. Jeff H Young

    Jeff H Young In the Trades

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    why must you use a barbed fitting? you need 3/4 female x whatever pipe you connect . shouldn't be hard to find
     
  9. Kevin121

    Kevin121 Member

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    My understanding is that a Barb fitting should be used with the Poly tubing.
     
  10. Jeff H Young

    Jeff H Young In the Trades

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    Well you stated you wanted to use Polyethylene What I see on that is a compression or a push fit . If you changed your mind and are using polyvinyl a soft hose but called tubing a barb is often used. size of tubing recommendation follow instructions that came with your particular softener .
     
  11. Kevin121

    Kevin121 Member

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    Sorry about that, yes I meant flexible Polyethylene tubing. I can only find fittings with Male ends on it , and need one with female 3/4 inch NPT for the one end and barbed on the other (or a female coupling perhaps. Also is FIP (iron pipe) threads equivalent to NPT?
     
  12. Reach4

    Reach4 Well-Known Member

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  13. Jeff H Young

    Jeff H Young In the Trades

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    sure making this hard put a 3/4 coupling on the end. is there a reason that wont work? go to hardware and buy whatever fits. besides you said this is a temporary connection.
     
    Reach4 likes this.
  14. Reach4

    Reach4 Well-Known Member

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    If he gets a reducing coupling, he can use the more common 1/2 inch thread.
    [​IMG]
     
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