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-   -   Pex Connection to CPVC (http://www.diychatroom.com/f7/pex-connection-cpvc-166149/)

natspawpaw 12-10-2012 04:20 PM

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.
https://encrypted-tbn2.gstatic.com/i...D65q_ZitHZ6Ftghttp://i.tfcdn.com/img2/iYA7ZUEAY5r8...VkA4A/fyVMtP8A

Is there a better connection?

bobfeather 12-10-2012 04:46 PM

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


Quote:

Originally Posted by natspawpaw (Post 1070449)
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.
https://encrypted-tbn2.gstatic.com/i...D65q_ZitHZ6Ftghttp://i.tfcdn.com/img2/iYA7ZUEAY5r8...VkA4A/fyVMtP8A

Is there a better connection?


Ishmael 12-11-2012 06:51 AM

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

joecaption 12-11-2012 07:51 AM

Just one fitting will do it.
http://www.sharkbite.com/usa/product...&category_id=8

paintdrying 12-11-2012 09:51 AM

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.

joecaption 12-11-2012 10:13 AM

And they tend to crack down the seam on the sides of the fitting.

TheEplumber 12-11-2012 12:17 PM

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

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Ishmael 12-11-2012 12:35 PM

Quote:

Originally Posted by TheEplumber (Post 1071036)
Why not buy a cpvc x pex adapter. They do make them

Sent from my iPhone using DIY Forum

Nice! Just googled it:

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

That'd be the way to go.

natspawpaw 12-11-2012 04:13 PM

Quote:

Originally Posted by TheEplumber (Post 1071036)
Why not buy a cpvc x pex adapter. They do make them

Sent from my iPhone using DIY Forum

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

Thanks

natspawpaw 12-11-2012 04:16 PM

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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