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 > Best PEX fitting system?

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ctilsie242

Austin

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Posted: 09/13/17 02:24pm Link  |  Quote  |  Print  |  Notify Moderator

I know what the first thing people say when it comes to PEX fittings, and that's Sharkbite/Gatorbite/etc. However, with those, there is only a single O-ring that can easily get nicked if one isn't careful inserting the tubing, and the O-ring will get eaten away over time by chlorine. Either way, you have a leak.

Crimp fittings are commonly used by RV makers, but twist the lines slightly, and they start to leak.

So far, the best I've found is Uponor's ProPex expanding fittings, which only work with their PEX-A pipe, and their expansion tool is not cheap.

Second best appears to be Flair-It fittings which assemble and disassemble by hand, and because they squeeze the PEX tubing on all sides, it does a good job.

What would one recommend for RV plumbing?

RLS7201

Beautyful Downtown Gladstone, MO

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Posted: 09/13/17 02:34pm Link  |  Quote  |  Print  |  Notify Moderator

I carry a selection of Flair-It fittings for emergencies. I have both 3/8" and 1/2" fittings and valves. Call me paranoid.
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darsben1

near Canada in NYS/ Casa Grande, AZ

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Posted: 09/13/17 02:38pm Link  |  Quote  |  Print  |  Notify Moderator

Shark bite has done well for me for 4 years now


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SidecarFlip

SE Michigan

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Posted: 09/13/17 02:44pm Link  |  Quote  |  Print  |  Notify Moderator

I have the crimp tool and bands and that is what I use. Tubing twist is more from not maintaining a steady firm grip on the tool when securing the bands more than anything else.
My in floor PEX hydronic heat system uses compression fittings with double 'o' rings. It's a Califfi (Italian Made system).


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RVhiker

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Posted: 09/13/17 03:33pm Link  |  Quote  |  Print  |  Notify Moderator

Stainless steel crimp rings have never let me down. The rings are fairly cheap, and I think my crimping tool cost about $45.


There's lots of advice and information in forums...
sometimes it is correct.

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ScottG

Bothell Wa.

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Posted: 09/13/17 04:25pm Link  |  Quote  |  Print  |  Notify Moderator

Personally, I like the Flare-it fittings. They were on our last TT and on the new one as well. They are very easy to work on and can be reused over and over. I use a heat gun to slide the Pex over the barbs.
I've never seen one fail.

I don't see why stainless steel or copper clamps wouldn't work well either but they should NOT be aluminum - which will stretch.

* This post was edited 09/13/17 04:32pm by ScottG *


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rjxj

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Posted: 09/13/17 04:46pm Link  |  Quote  |  Print  |  Notify Moderator

You are correct the gun isn't cheap but uponor is the system that is used in home building. After getting stupid high price quotes my son bought the gun and we did it all ourselves. Sharkbite is easy and great for limited use. I always slightly chamfer the edge of the pex for no sharp edges

Dutch_12078

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Posted: 09/13/17 04:53pm Link  |  Quote  |  Print  |  Notify Moderator

I have Watts/Sea Tech fittings (similar to SharkBite) that have been in place for over ten years with no failures to date.


Dutch
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gbopp

The Keystone State

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Posted: 09/13/17 05:04pm Link  |  Quote  |  Print  |  Notify Moderator

I've never used it but, the Uponor system appears to be a good option. If I did a lot of plumbing I would buy one.

For limited use, SharkBite works great. I've had them on the heating and water system in our S&B almost 12 years, no leaks or problems. I removed and reinstalled a few of them, no nicks, no leaks and no failures.
Use the depth gauge/deburring tool to chamfer the edge before installing the SharkBite fitting. You won't have any problems.

theoldwizard1

SE MI

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Posted: 09/13/17 05:20pm Link  |  Quote  |  Print  |  Notify Moderator

If you are in a tight spot, then obviously, SharkBite.

We used the compressed copper rings when we did my son's house.

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