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Old 01-17-2011, 08:29 PM   #1
gunner65
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Default Question for plumbers or the experts in fittings

I want to put 1/2 npt male threads onto my 3/8" CFCs copper tubing do I use 1/4" to 1/2" npt fittings as I used 1/4 to 1/2 reducers on the CFC itself? I cannot find this information anywhere though I am sure it is out there somewhere. I link to the actual product would be nice.

Thanks in advance.


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Old 01-17-2011, 08:41 PM   #2
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I believe you want something like this: 3/8" tube compression to 1/2" NPTM.

http://www.grainger.com/Grainger/PAR...241?Pid=search

-Joe


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Old 01-17-2011, 08:44 PM   #3
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Thanks Joe but I should have made my question more clear as the compression type fitting are obvious on sizing it is the copper solder cup type that I am confused about.
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Old 01-17-2011, 08:44 PM   #4
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Quote:
Originally Posted by gunner65 View Post
I used 1/4 to 1/2 reducers on the CFC itself?
Just went back and re-read your post and this part confuses me. Do you have a picture?

-Joe
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Old 01-17-2011, 08:45 PM   #5
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Use 3/8" compression x 1/2" male NPT adapters. You can find these at Home Depot, Lowes or most any hardware store. Here's link to an online source: Compression x Mips Adapters scroll down the page a bit and you will see them under Compression X Mip Adapters.
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Old 01-17-2011, 08:45 PM   #6
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The solder cup type should be the same. The only problem may be finding a direct 3/8" tube to 1/2" NPT adapter. You may need to solder a second adapter in there.

-Joe
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Old 01-17-2011, 08:47 PM   #7
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Quote:
Originally Posted by gunner65 View Post
Thanks Joe but I should have made my question more clear as the compression type fitting are obvious on sizing it is the copper solder cup type that I am confused about.
I think you are looking for a 3/8" sweat x 1/2" Male NPT adapter. These can be had, but are not as commonly available. Try a local plumbing supply house.
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Old 01-17-2011, 10:39 PM   #8
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Thanks all

Joe a 1/4" reducer ID is 3/8" so in a typical CFC you run the 3/8" tubing through a 1/2 x 1/4 reducer. So I think Catt22 answered my question. It was very tough to actually put this question in writing so that all could understand what I am asking for. Thanks everyone.
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Old 01-17-2011, 11:25 PM   #9
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its a tricky beast, the 3/8" tubing is refrigerator tubing and referring to the OD of the of the tubing. where as the 1/2x1/4 fitting is referring to the ID of the tubing. a 1/2x1/4 reducer will fit the 3/8 refrigerator tubing just fine. test fit in the store to make sure you get the right stuff.


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Old 01-21-2012, 06:21 PM   #10
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Can you let me know what you did? I think I need to do the same thing. I need to adapt the 3/8" OD soft copper tubing (on both in and out side of the CFC) to a 1/2" NPT male quick disconnect for coupling to my female quick disconnect leading to my 1/2" ID silicone tubing.


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