How To Connect Non-threaded 1/2 Inch CPVC To A Compression Shut-off Valve - Plumbing - DIY Home Improvement | DIYChatroom


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Old 12-11-2006, 07:37 PM   #1
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How to connect non-threaded 1/2 inch CPVC to a compression shut-off valve


Hi Experts,

I have this dilemma. I have 1/2 inch cpvc. I need to connect a metal compression shut-off valve to this cpvc. Any idea of how I should proceed? I am new to this, please explain in detail.

Thank you,
Andy

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Old 12-11-2006, 10:26 PM   #2
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How to connect non-threaded 1/2 inch CPVC to a compression shut-off valve


Just like compressing it on copper, slip it on and tighten it up.

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Old 12-12-2006, 12:37 AM   #3
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How to connect non-threaded 1/2 inch CPVC to a compression shut-off valve


Use a backup wrench on the valve to hold it steady, and tighten the nut tightly.
The compression ring actually seals it, not the threads, so if it slightly leaks after you tighten it, smear a litle clear silicone caulk on the brass ring ferrule instead of the threads.
That "clear silicone caulk" always chokes my ole buddy Ron. LOL (He's a pro, I'm not...but it works for me.)
Good Luck!
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Old 12-12-2006, 09:35 AM   #4
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How to connect non-threaded 1/2 inch CPVC to a compression shut-off valve


Ok...then I have this question. I read somewhere that you are not supposed to use a metal compression ring on a cpvc pipe (maybe because it can crack the pipe when tightening). Is that true? What I am talking about is if I use a metal compression ring from the valve fitting on cpvc pipe...is that allowed/going to work? Should I maybe be using a plastic compression ring instead? Please let me know.

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Old 12-12-2006, 07:10 PM   #5
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How to connect non-threaded 1/2 inch CPVC to a compression shut-off valve


You can use the metal compression ring on cpvc, take hand tight then 1/2 turn more tight, if you get a leak, tighten little at a time.
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Old 12-12-2006, 09:56 PM   #6
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How to connect non-threaded 1/2 inch CPVC to a compression shut-off valve


(Slowly I creep...inch by inch...CAULK!)
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Old 12-12-2006, 10:02 PM   #7
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How to connect non-threaded 1/2 inch CPVC to a compression shut-off valve


I like to apply a thin coat of pipe dope on the points that create the seal.

Someday I'll come across a job where there was caulk used and I'll ask where did they learn that, I bet they will say Mike on DIYChatroom told them that.

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