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Author Topic: Pex or CPVC?  (Read 4466 times)
Danny
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« on: July 27, 2006, 06:47:28 PM »

I am getting ready to start plumbing.  I have read recommendations to use flexible supply lines - understand about vibrations.  Is this such an issue?  What is the groups thoughts?

Thanks,
Danny
« Last Edit: July 28, 2006, 07:51:18 AM by Dallas » Logged

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Nick Badame Refrig/ACC
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« Reply #1 on: July 27, 2006, 06:57:32 PM »

Ok,  I'll vote

PEX




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« Reply #2 on: July 27, 2006, 07:02:36 PM »


Pex!     And it comes in cool colors so you can code the functions.
JR

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« Reply #3 on: July 27, 2006, 07:50:37 PM »

PEX!! Absolutely! PEX!!
-Use the compression fittings and youll be able to take apart and drain if needed or add a tee when(not if) you change your mind.
- can run long lengths in one peice
- alot more freeze resistance
- no toxic glues or flames needed
- again the pretty colors
- you can use these if you have room instead of elbows http://www.pexconnection.com/products.php?pID=184&catID=105

I even used it in my house
« Last Edit: July 28, 2006, 07:19:01 PM by NewbeeMC9 » Logged

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Beatenbo
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« Reply #4 on: July 27, 2006, 08:07:41 PM »

Don't even think about pvc or cpvc. The least litte freeze and it will shatter. The Quest fittings are a little higher well worth the investment   Pex Pex Pex
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« Reply #5 on: July 27, 2006, 08:57:20 PM »

Hmmm.  I think.... PEX !!!!!  You'll LOVE it
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ceieio
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« Reply #6 on: July 27, 2006, 10:20:04 PM »

I have pex in my bus.

Craig - MC7 Oregon
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Danny
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« Reply #7 on: July 27, 2006, 11:57:41 PM »

OK - PEX IT IS!   Wink

Thanks,
Danny
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« Reply #8 on: July 28, 2006, 04:24:43 AM »

What's Pex?

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Dallas
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« Reply #9 on: July 28, 2006, 04:46:22 AM »

What's Pex?

Jeremy


Jeremy,

PEX is a type of tubing used in plumbing that has characteristics that makes it superior to copper, steel, poly tube, PVC, or any other kind of tubing used to carry fresh water.

PEX stands for Crosslinked Polyethylene and is strong, flexible, unaffected by indirect sunlight, freeze damage resistant, and makes tight leak free connections.

Here is a link to a PEX products Fact sheet:

http://www.ppfahome.org/pex/faqpex.html

IHTH

Dallas
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« Reply #10 on: July 28, 2006, 05:39:24 AM »

Thanks - I'll have to see if it available here, as plumbing is my next job

Jeremy
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« Reply #11 on: July 28, 2006, 05:48:51 AM »

PEX...plus you can buy the stuff at 'lowes'
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belfert
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« Reply #12 on: July 28, 2006, 06:10:13 AM »

PEX is also available at Home Depot and Menards.  I don't know how much of a fitting selection Home Depot has.  Menards has lots of fittings.

Brian Elfert
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« Reply #13 on: July 28, 2006, 07:42:32 AM »

We don't have any of those stores here I'm afraid - I'm in the UK

Jeremy
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« Reply #14 on: July 28, 2006, 07:53:00 AM »

We don't have any of those stores here I'm afraid - I'm in the UK


I purchased all my PEX stuff on line.  The piping that I used is called "flex-pex" ... just comes in coils and seems to be a tad more flexible than the straight stick stuff available at Lowe's etc.  For fittings, I ordered the Flair-It elbows, unions, etc..  Pretty easy to handle.  Love it.

See if this web site has info for shipping to the UK, or better yet Google around and I'll bet you can find PEX sold in the UK.
http://www.pexconnection.com/
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« Reply #15 on: July 28, 2006, 04:23:00 PM »

I have PEX in my bus.  When I was plumbing my mister system and had to go thru the engine bay which is hot.  I was told that if you have a hot, ~200 degree environment that CPVC or copper is recommended.  The PEX is great because the fittings are easy to put together.
Happy Trails,
Brent
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« Reply #16 on: July 28, 2006, 04:48:11 PM »

Well, I will step out on a limb here and admit I used CPVC Lips Sealed

It was strictly a personal decision all things considered.

I am a Form and Function type of person, personally and professionally.

It has to WORK right and LOOK good.

I didn't feel I could make the pex look right(to my standards) in exposed locations.

My CPVC is clamped to the top of the bays with electrical offset clamps and basically squared everywhere it

goes, grommets at all thru wall locations.

If you have ever been on a ship you will know the look.

I also live in the Southeast where freezing temps are not such a problem.

Cliff
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NewbeeMC9
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« Reply #17 on: July 28, 2006, 07:21:37 PM »

OK - PEX IT IS!   Wink

Thanks,
Danny


That Danny can take a hint Grin Cheesy
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Nick Badame Refrig/ACC
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« Reply #18 on: July 28, 2006, 08:21:20 PM »

I have PEX in my bus. When I was plumbing my mister system and had to go thru the engine bay which is hot. I was told that if you have a hot, ~200 degree environment that CPVC or copper is recommended. The PEX is great because the fittings are easy to put together.
Happy Trails,
Brent

Hi Brent,

pex also has a product called Heat Pex that we use on in floor radiant heat systems.

pex recommends we use the brass fittings and copper rings for the hi temp applications.

It's max temp is 250 deg.    Good product for the mister systems.

I have a 1000ft. roll of 1/2" that we always keep in the shop

Nick-
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JackConrad
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« Reply #19 on: July 29, 2006, 05:00:10 AM »

Cliff,
   Is this CPVC Anonymous?  I used CPVC in our bus also. At the time I did our plumbing was about when all the lawsuits about all the failed plastic tubing used in mobile homes were in the news. Scared me! I had recently plumbed our entire house with CPVC and felt comfortable with it. All lines are straight runs that are attached to the walls with a slight slope. I open one drain valve in the bay and the faucets to let air in the the entire system is drained. If I was doing a bus today, I would use the rigid lengths of PEX. Best of both worlds, straight runs and better freeze resistance.  YMMV Jack
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« Reply #20 on: July 29, 2006, 05:23:35 AM »

Jack,

I didn't mention it in my first post, but I, like you, was aware of all the failures of plastic pipe(quest, I believe) in the news,

and thats why I also went with CPVC.

And of course in the Southeast Pex isnt as popular due to the lack of longstanding freezing temperatures. Grin

I would also go to pex if starting over.

Have you considered adding a 12 step program for CPVC users at the next Bussin?

Maybe you and I could give our testimony and help others come out of the (water)closet! Wink

Cliff
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« Reply #21 on: July 29, 2006, 09:09:45 PM »

I used PEX....

Then I saw that PVC ( Poly Vinyl Chloride ) was in the news over exposure to the chemicals and some ambulance chasers
were looking for clients that had been exposed to PVC and or materials used in its manufacture. I think it was along the
same lines as the Poly Butalene ( Grey stuff ) that was used in some places.

I never liked the taste of the solvent cement getting into the PVC or CPVC myself. If you can taste it, It cannot be good.

Never had a problem with the current PEX tubing ( white ) and it behaves very well being abused and shoved around
and vibrated and is much easier to install when the only helper you have is yourself....I used the crimp rings.
bought the tools at a pawn shop for $15.00 ( both 1/2" & 3/4" )... same crimpers as electrical connectors.
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« Reply #22 on: July 30, 2006, 09:14:37 AM »

Jack,

I didn't mention it in my first post, but I, like you, was aware of all the failures of plastic pipe(quest, I believe) in the news,

You're probably thinking of the failures of the old Polybutadene (sp?) pipe often used in older mobile homes.  PEX is different and so far isn't failing unless the installation is done wrong.  They have even used this stuff in some million dollar homes here in Minnesota, even though most builders still seem to be doing copper.

Some plumbers and plumbing supply houses refuse to have anything to do with PEX until it has more time in the field.  Some of them got burned with the whole polybutadene plastic pipe thing.

Brian Elfert
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« Reply #23 on: July 30, 2006, 10:40:55 AM »

All the PEX fittings I have bought state in the installation instructions that it is not to be used in places where it is not accessable.  I guess the lawyers are pre-loading in case this stuff ever fails...
Happy Trails,
Brent
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belfert
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« Reply #24 on: July 30, 2006, 11:03:41 AM »

All the PEX fittings I have bought state in the installation instructions that it is not to be used in places where it is not accessable.  I guess the lawyers are pre-loading in case this stuff ever fails...

Copper fittings and parts can break too.

I had a brass valve for copper fail in my new house a few weeks after I moved in.  The valve was buried in the floor.  Lucky I saw the leak before I went to work or the builder would have had a big repair bill.  The plumber had to remove a cabinet and cut a hole to get to it.

The valve is for water to an unfinished bathroom that will eventually be finished.  No Idea how I would have ever figured out where the valve is if it hadn't leaked.

Brian Elfert
« Last Edit: July 30, 2006, 02:26:36 PM by belfert » Logged
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« Reply #25 on: July 30, 2006, 02:08:51 PM »

All the PEX fittings I have bought state in the installation instructions that it is not to be used in places where it is not accessable.  I guess the lawyers are pre-loading in case this stuff ever fails...
Happy Trails,
Brent


These fittings, which by the way can be used for CPVC, PEX or Copper, or any combination, are approved for use in non-accessable places...http://www.cashacme.com/sbpush.php

Jay
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« Last Edit: July 30, 2006, 02:19:21 PM by Dallas » Logged

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« Reply #26 on: July 30, 2006, 04:44:50 PM »

 Pex is what I used and it has worked well.  However, I used crimped fittings except in one place, and guess what leaked?  It was a nut and ball with a star washer sort of affair that connected to 1/2" pipe, and the first one leaked....I replaced it, and the second one leaked.  Found a crimp fitting that had a hand nut on it and it has worked without issues.   Be careful where you use the non-crimp fittings.  The non-crimp fittings are expensive (relatively) too. 
I have a pressure regulator in the "city" water line...sort've odd that multiples of the same fitting design leaked.  One the recommendation of a knowledgeable plumber type, I doubled the star locks on one if the failed fittings...this didn't work either.  The pex tubing would gradually work out of the fitting.   Don't know if it was related to motion or what, but, based on this experience, I'd avoid the non-crimped fittings.   
JR
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