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Old 12-10-2012, 05:20 PM   #1
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Pex Connection to CPVC


I will be making 1/2" PEX to 1/2" CPVC using copper crimp rings. Any recomendations on how these connections should be made? I'm looking at using a male pex to a brass female (with rubber washer) that has cpvc attached for gluing.


Is there a better connection?

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Old 12-10-2012, 05:46 PM   #2
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Pex Connection to CPVC


why not just use a 1/2" sharkbite ? have yet to see one fail
bob


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Originally Posted by natspawpaw View Post
I will be making 1/2" PEX to 1/2" CPVC using copper crimp rings. Any recomendations on how these connections should be made? I'm looking at using a male pex to a brass female (with rubber washer) that has cpvc attached for gluing.


Is there a better connection?

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Old 12-11-2012, 07:51 AM   #3
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Pex Connection to CPVC


I'm a plumber, but I've never used CPVC except to make a minor repair once on an existing system. I'm just curious - why the rubber washer? I know the PEX x male adaptor has a tapered thread (pipe thread), and I would assume the CPVC x female adaptor does also(?) If so, there's no need for the rubber washer - just some teflon tape or pipe dope. Does the washer come with the CPVC fitting, or were you planning to add it?

Edited to add: I just googled it, and saw that the washer is integral to that fitting, so you shouldn't use it with that PEX adaptor. I'd use a CPVC x male adaptor (all plastic):

http://www.pvcfittingsdirect.com/_e/...chedule_40.htm,

and a 1/2" PEX x female adaptor (brass):

http://www.pexsupply.com/Wirsbo-Upon...-PEX-x-1-2-NPT

Last edited by Ishmael; 12-11-2012 at 08:24 AM.
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Old 12-11-2012, 08:51 AM   #4
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Pex Connection to CPVC


Just one fitting will do it.
http://www.sharkbite.com/usa/product...&category_id=8
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Old 12-11-2012, 10:51 AM   #5
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Pex Connection to CPVC


Sorry to say, I feel in a diy situation a sharkbite is going to be the way to go. Plastic to brass leaks all to often if not done properly, which can be tricky.
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Old 12-11-2012, 11:13 AM   #6
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Pex Connection to CPVC


And they tend to crack down the seam on the sides of the fitting.
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Old 12-11-2012, 01:17 PM   #7
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Pex Connection to CPVC


Why not buy a cpvc x pex adapter. They do make them

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Old 12-11-2012, 01:35 PM   #8
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Pex Connection to CPVC


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Why not buy a cpvc x pex adapter. They do make them

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Nice! Just googled it:

http://www.siouxchief.com/Supply/Fit...-Adapter.7X8VK

That'd be the way to go.
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Old 12-11-2012, 05:13 PM   #9
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Pex Connection to CPVC


Quote:
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Why not buy a cpvc x pex adapter. They do make them

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I didn't know such a thing existed. Exactly what I need.

Thanks
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Old 12-11-2012, 05:16 PM   #10
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Pex Connection to CPVC


Are those sharkbite fittings really reliable? And if not for cost would you use them instead of copper crimps on pex?

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