Straightening Pex tubing

   / Straightening Pex tubing #11  
i am curious why pex has got so popular for things like this, an water lines, when pvc for sure is cheaper, an maybe cpvc?
heehaw
 
   / Straightening Pex tubing #12  
i am curious why pex has got so popular for things like this, an water lines, when pvc for sure is cheaper, an maybe cpvc?
heehaw

Pex is flexible and is so easy to install, just run the line to where you want, snip it off and a couple crimps or collars and its done. It only takes about 1/4 of the time of CPVC and 1/10 of the time of copper. Also, if the lines freeze pex will expand and is less likely to rupture then Cpvc or copper.
 
   / Straightening Pex tubing #13  
If you have to buy more you should buy the straight 20 ft. long pcs. It is so much easier to work with and does a nice neat looking job. Also they tell me that you cannot use pvc for hot water. Only cold.
Clayton
 
   / Straightening Pex tubing #14  
i am curious why pex has got so popular for things like this, an water lines, when pvc for sure is cheaper, an maybe cpvc?
heehaw

Because pvc is brittle, especially when aged, and when it fails with compressed air or gasses, it send shards long distances. We had this happen to a 1" line @ 110 psi where I work. Pretty impressive. Glad no one was working in that area. Never use pvc for compressible air or gasses. There is a lot of stored energy there. When pvc fails with a liquid, you have a leak. When it fails with compressible air or gas, you have pretty close to a bomb.

Kim
 
   / Straightening Pex tubing #16  
How about PEX & PVC in heat/fire conditions..?? is this a potential bomb also
 
   / Straightening Pex tubing #17  
Big difference between PEX and PVC -- PVC is best used for central vacuums and drains -- does not even make good blade edge on a snow blade:eek:
 
   / Straightening Pex tubing
  • Thread Starter
#18  
I chose pex because of it's low cost and ease of installation, minimum # of joints and fittings required.

I have worked in many shops with PVC airlines, and seen some rupture, and it just is not pretty. While there could be a failure with PEX, (as with any system) I do not believe it has the potential to shatter like PVC does.

I am using what this website calls the "standard Connection method"
PEX Information

While many folks refer to Sharkbite as the type of connector that grabs multiple different pipe, it is actually a brand, kind of like so many of us have "crescent" wrenches in our toolbox made by Craftsman.

I did not know the PEX came in straight lengths, had never noticed it before and will look at that tomorrow.

Current thoughts are a hotbox, and some clamps and go to town running it along the wall, but if I can readily find the straight lengths, that may be a better idea.

The one problem I see is noted on the front of the website above "PEX tubing does not transfer heat as readily as copper, and so conserves energy." what this means in my application though is that the moisture won't drop out as well either. On my drop leg for my plasma, I am going to put in a 1/2" drop of copper about 5' long with a drain at the bottom. Don't know if I need to or it will be enough, but think it is a good compromise for what I am doing.

I like the hot water idea, may have to try that one, and my heater needs to be flushed anyway.

When using it to run water to my dad's trailer was it nice, just a joint at each end, across the ceilings, through the pipes, under ground and down and up walls and no place to leak. Simple clamping up in a hole under the trailer that I would have absolutely hated to reach into with a torch to solder. Really sold me on the stuff, then once you bought the tool, the rest is competitively priced.

Oh, and I picked up a Zurn 3/4" standard crimp tool new from HD for $14 because they were changing brands. Gotta love that.
 
   / Straightening Pex tubing #19  
Kwentling,

I'm all for new stuff, but leary of the easy way out..

I have heard of PEX being used this way and I expect it is all right. Would be easier alright.

Kim
 
   / Straightening Pex tubing #20  
I installed PEX air lines in a dentist office several years ago. It has worked perfectly. One advantage, is no gritt or scale from the lines. I am planning a garage job in the near future. I am going to use the blue PE pipe under the slab for air. It is rated for slightly higher pressure than PEX. It uses the same fittings , and sleeves.
 

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