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Nitro 10-16-2007 11:20 PM

How to join new pex to old copper?
Hi, can you tell me how this is done?

Marlin 10-16-2007 11:39 PM

Any place that sells pex will sell a sweet by pex adapter. You just sweet one side on then attach the other side to your pex with the appropriate method.

RippySkippy 10-17-2007 06:23 AM

Depending on which way you need to go, there's either female or male fittings. I've used copper and brass, and either seem to work well, I prefer the brass fittings. I usually get what ever the local store has.

scrapiron 10-17-2007 07:52 PM

You might consider the sharkbites. They cost more but they're fast and you can join copper, cpvc, and pex with the same fitting.

mdlbldrmatt135 10-17-2007 08:08 PM

I second the Sharkbites

Nitro 10-18-2007 04:46 PM

Home Depot where I got the Pex has solid copper (or brass) rings or a crimper-style which I'm told frequently leak and are only suitable for irrigation (outdoor) applications. Is this:
the clamp your referring to and does it really work? Anyone know where I can get them in Calgary?

Marlin 10-18-2007 07:33 PM

I never heard anything bad about shark bites but I still don't trust em.
As for pex the only kind I use is the stainless steel crimp style. The only leaks to date in my experience have been from under-crimping the rings. I'm not worried about them ever rotting out as I've seen the sprinkler ones which are less heavy duty come out of the ground looking perfect after being buried for years. I would worry about copper crimps corroding away though.

RippySkippy 10-19-2007 09:47 AM


Originally Posted by Marlin (Post 68873)
... I would worry about copper crimps corroding away though.

maybe in an underground environment IF the soil conditions were harsh. I've seen 50 year old copper come out looking like it were almost local conditions could definitely have an impact on direct soil contact application. No soil contact, I wouldn't give it a second thought...proper application goes a long way to having a leak free install.

I second the sharbite fittings...I ONLY use them IF it's the only way out not buried in a wall. That said they are PERFECT for temporary applications. For example I pressure check every supply run by itself, I have a gauge and air fitting on a 1/2" and 3/4" T. It's great to pop one on, check. Remove with no damage, and check another line. With the T you can check 2 lines at once, or plug and use it for one. It works for me.

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