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 > Best PEX fitting system?

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KD4UPL

Swoope, VA

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Posted: 09/13/17 06:06pm Link  |  Quote  |  Print  |  Notify Moderator

I don't trust Sharkbite style to last for many many years. I always crimp. I use both copper rings and the stainless steel rings depending on the situation. I have the tool for both.

72cougarxr7

Northern NY

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Posted: 09/13/17 07:46pm Link  |  Quote  |  Print  |  Notify Moderator

I use the stainless cinch clamps.

cinch tool

I like that system because one tool will work with all pipe sizes, the copper rings have to have a different tool or die for each pipe size.

Used many when I did a water heater and well pressure tank install in my house.
Never had one leak

joebedford

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Posted: 09/13/17 07:52pm Link  |  Quote  |  Print  |  Notify Moderator

Copper crimp rings.

mobeewan

Hampton, Va

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Posted: 09/13/17 10:23pm Link  |  Quote  |  Print  |  Notify Moderator

RLS7201 wrote:

I carry a selection of Flair-It fittings for emergencies. I have both 3/8" and 1/2" fittings and valves. Call me paranoid.
My neighbors, that I help, call me all sorts of things. Including, "lets go to dinner, my treat".

Richard


Flair-it for me too. My trailer had mostly half inch Flair-it fittings & Flair-it x pipe thd. There were also a few hose clamps.
I've done some piping mods myself so I have plenty of spare 1/2 inch Flair-it fittings and a 1/2 x 3/8 Flair-it fitting wrench. And I'm not paranoid, okay maybe just a little.

myredracer

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Posted: 09/14/17 09:08am Link  |  Quote  |  Print  |  Notify Moderator

ctilsie242 wrote:

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


What they commonly use in RVs are "cinch clamps", not crimp fittings. Crimp fittings use a copper crimp ring and a PEX "crimper" is used to install them.

There are 6 ways to connect PEX piping to the fittings as explained in this youtube vid. Never use gear/hose clamps on PEX.

I really like copper crimp rings. They're small and pretty inexpensive. I bought a crimper off ebay about 10 years ago when building a new shop & house. I've used it a lot off and on over the years. Has interchangeable dies that will do 1/2" to 1" sizes. There are a few smaller sized "pocket" crimper styles like in the photos. These are great for working in tight spaces like inside cabinets in an RV. Full size crimper is on right. A pocket crimper would be a good choice for a box o' tools in an RV.

Using copper crimp rings is pretty much foolproof providing the crimper is correctly calibrated and there is a "go no-go" gauge that will tell you if they are properly tightened. It's very fast too. I've done thousands of PEX crimps and never had a single leak. Using a PEX tubing cutter is a must-have tool so you get clean cuts and square ends.

Sharkbite (or equivalent) fittings have their place but are heavy, bulky and expensive. The photo below shows a solenoid valve setup I just installed in our TT. It's very compact and there's no way that could be done with sharkbites. Also shown is a pressure regulator and filtration under the kitchen sink. Besides being bulky, using sharkbites would have been quite expensive.

RVs typically use plastic PEX fittings. Personally I don't like them but they don't seem to cause problems. I always use brass fittings in our TT. Easy to find all over the place too.

I am guessing that the reason they use cinch clamps at the factories is because of all the one-eyed monkeys they use to slap RVs together and cinch clamps are probably more foolproof. Copper rings are cheaper and you'd expect them to be used in that case, but they don't.

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* This post was last edited 09/14/17 09:35am by myredracer *   View edit history


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time2roll

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Posted: 09/14/17 09:35am Link  |  Quote  |  Print  |  Notify Moderator

I have used Flair-It and Sharkbite in the RV. I far prefer Sharkbite.

Yes if I was doing an entire home or repairs on a regular basis I would get the crimper.


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randallb

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Posted: 09/24/17 07:04am Link  |  Quote  |  Print  |  Notify Moderator

Brass fittings are expensive but plastic break. Brass fittings are expensive but shark bite, etc are even more expensive. I purchased my crimping tool about 5 years ago for a raised bed garden irrigation system and later used it to rebuild my new trailer's plumbing from the pump all the way through the H2O heater and drains when I installed the outdoor shower. The best investment in a tool for quite some time. A crimper can be tough to use in some areas but with a little thought you can pre-build assemblies so that the install crimps are in an open area that allows good access for the crimp tool.

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