Polyethelene tubing adapter for Water Softener drain

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!

 

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

 

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...

 

• 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?

 

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...

 

Are you sure that is what you need? I suggest that you confirm that, before seeking the fitting. A 3/4 MIP thread on the softener would measure just over 1 inch OD.

https://www.diversitech.com/en-US/item/id/8563

https://www.supplyhouse.com/DiversiTech-701-019-1-2-Barb-x-3-4-FIPT-Nylon-Adapter-Elbow-Pack-of-2 is what you may want.

 

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

 

My understanding is that a Barb fitting should be used with the Poly tubing.

 

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 .

 

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?

 

Yes for practical purposes, AKA FNPT, FPT.

However https://cloudfront.zoro.com/img/zoro_tips/pipe_thread_definitions_eZtip.pdf says similar rather than same. I wonder what that is about.

 

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.

 

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