Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 01-15-2009, 06:20 PM   #1
Newbie
 
Join Date: Jan 2009
Posts: 20
Share |
Default

Pex connections failing


I have a large home that I believe has PEX piping (the home is only two years old). Twice (once under the house and once under the bathroom sink) a connection failed and the plastic pipe shot off of the copper fitting. Catastrophe was avoided both times because we were at home.

Now the home is vacant, to be rented out. Are these failures caused by high water pressure? (the house has a hot water recirculation system that could be a factor). I plan to check the pressure with a water pressure gauge. Any
other suggestions?

mainstreetprod is offline   Reply With Quote
Old 01-15-2009, 07:06 PM   #2
Member
 
Join Date: Jan 2009
Location: Long Island
Posts: 348
Default

Pex connections failing


Is this freeze related? I wonder what kind of fittings were used? Any chance of you posting a picture?

And not for nothing but three in less than two years, Im shutting off the water, draining the pipes and calling a pro to come in and check it out. So far Ive tried three different types of Pex fittings and like only one.

Some crimp fittings IMHO, are garbage, some are better.

II Weeks is offline   Reply With Quote
Old 01-15-2009, 07:16 PM   #3
Member
 
Join Date: Dec 2007
Location: Baltimore, MD
Posts: 1,802
Default

Pex connections failing


What kind of fittings were they? Copper crimp rings?
jerryh3 is offline   Reply With Quote
Old 01-15-2009, 07:32 PM   #4
Member
 
Join Date: Nov 2008
Posts: 113
Default

Pex connections failing


There are no copper pex fittings, there are plastic or brass, you probrably have brass. As for under the slab leaks, there should be no connection under the slab because the copper crimp rings are not rated for instalation in dirt(unless you ment you have a crawl space), if there are fitings under the dirt they should not have been there. The tool plumbers use (a crimper) has to be calabrated to ensure a complete crimp of the ring, after many uses the crimpers tend to lose its calabration, its a quick fix for the crimpers, but not for your house. There is a calabrater they sell(very cheap) to check if the rings are being crimped full, one side has slots for "GO"wich means the rings are fine or slots with "NO GO", wich means the crimper is not calabrated correctly, its a simple tool, you simply try to slide the slots over the ring that are on the pipe , if it slides over the ring the ring is fully compressed over the barbs on the fitting. I would buy this tool and check as many fittings that are exposed.
zosoplumber is offline   Reply With Quote
Old 01-15-2009, 07:42 PM   #5
I have gas!
 
Clutchcargo's Avatar
 
Join Date: Mar 2007
Location: Massachusetts
Posts: 1,767
Default

Pex connections failing


Fortunately, there should not be too many, if any, fittings in the walls. I wonder if this is a case of mismatching the brands of fittings vs. tubing. In any case pictures would be helpful.
__________________
I tear things down and build them up.
Clutchcargo is offline   Reply With Quote
Old 01-15-2009, 07:48 PM   #6
Member
 
Join Date: Nov 2008
Posts: 113
Default

Pex connections failing


Right, the beauty of pex is the ability to use less fittings, there should be some exposed, like the supply lines might have a crimped pipe at the shut off valve, unless they stubed out with copper. Or the supply to the heater, if these locations do have crimped fittings I would check there
zosoplumber is offline   Reply With Quote
Old 01-15-2009, 09:18 PM   #7
Newbie
 
Join Date: Jan 2009
Posts: 20
Default

Pex connections failing


Sorry - I failed to mention that the house is off grade, the leak underneath
was easy to fix. I'm not at the house to look at the piping right now- but I know the fitting under the house was brass. I don't recall any type of crimp ring. Do all Pex systems use crimp rings?
The water is shut off right now due to the house being vacant. I didn't drain the system - furnace is on and under the house, so should be OK.

The problem is definitely not freeze related, happened in the summer.
mainstreetprod is offline   Reply With Quote
Old 01-15-2009, 09:47 PM   #8
I have gas!
 
Clutchcargo's Avatar
 
Join Date: Mar 2007
Location: Massachusetts
Posts: 1,767
Default

Pex connections failing


There is one system that uses an expanding tool and a collar also made out of pex that simply stretches over the fittings. Since pex has memory, it supposedly keeps a tight connection. I don't know, I think I would rather use a cinch clamp or crimp ring system.
__________________
I tear things down and build them up.
Clutchcargo is offline   Reply With Quote
Old 01-15-2009, 09:53 PM   #9
Member
 
Join Date: Jan 2009
Location: Long Island
Posts: 348
Default

Pex connections failing


Quote:
There is one system that uses an expanding tool and a collar also made out of pex that simply stretches over the fittings.
Thats system uses the everloc and slides a brass ring over the expanded pex. Huge advantage to this system is that the fittings are true to the size of the pipe. The typical pex fitting reduces the size of the pipe at the fitting by about 1/3rd. add on the 90's and want not and you have restricted flow and volume.
Attached Thumbnails
Pex connections failing-everlok_vs_crimp.jpg  

Last edited by II Weeks; 01-15-2009 at 09:56 PM.
II Weeks is offline   Reply With Quote
Old 01-16-2009, 06:37 AM   #10
Member
 
Join Date: Nov 2008
Posts: 187
Default

Pex connections failing


Umm.. didn't this site have and add at the top of it about a class action suit on a pex fitting manufacturer?

Found it http://www.zurnclassaction.com/

Gary

Last edited by Gary_602z; 01-16-2009 at 06:42 AM.
Gary_602z is offline   Reply With Quote
Old 01-16-2009, 06:44 AM   #11
Member
 
Join Date: Dec 2007
Location: Baltimore, MD
Posts: 1,802
Default

Pex connections failing


Quote:
Originally Posted by Gary_602z View Post
Umm.. didn't this site have and add at the top of it about a class action suit on a pex fitting manufacturer?

Found it http://www.zurnclassaction.com/

Gary
I think Zurn had a bad batch of fittings that had a few failures. This sounds like more of an installation problem.
jerryh3 is offline   Reply With Quote
Old 01-16-2009, 07:56 AM   #12
Registered User
 
Termite's Avatar
 
Join Date: Apr 2008
Posts: 6,520
Default

Pex connections failing


Quote:
Originally Posted by Gary_602z View Post
Umm.. didn't this site have and add at the top of it about a class action suit on a pex fitting manufacturer?

Found it http://www.zurnclassaction.com/

Gary
That issue is old news. The problems with Zurn's fittings were rectified years ago, although some of the old ones are still out there...So there are still people dealing with it. Any leaks in a new PEX system can almost certainly be attributed to poor installation practices.
Termite is offline   Reply With Quote
Old 01-16-2009, 07:58 AM   #13
Registered User
 
Termite's Avatar
 
Join Date: Apr 2008
Posts: 6,520
Default

Pex connections failing


Here's a picture of the aforementioned expansion PEX fitting. A tool is inserted into the tubing that expands it and allows for insertion of the fitting. The tubing's memory causes it to grab the barb very hard. Awesome setup, but less common due to the cost of the tool and fittings. The crimp-type are much more common, and in my opinion are just as solid. I've installed a heck of a lot of PEX and have 100% faith in the product.
Termite is offline   Reply With Quote
Old 01-16-2009, 08:58 AM   #14
Newbie
 
Join Date: Jan 2009
Posts: 20
Default

Pex connections failing


All the connections under the house are definitely the system pictured above, except the fitting the pex goes on is brass.
I don't recall the connection under the sink looking like that but will check today.

How should I , or the plumber, check for proper work on this type fitting? I assume a "Go, no go" tool won't work.

Last edited by mainstreetprod; 01-16-2009 at 09:00 AM.
mainstreetprod is offline   Reply With Quote
Old 01-16-2009, 08:16 PM   #15
Newbie
 
Join Date: Jan 2009
Posts: 20
Default

Pex connections failing


I checked the other line that blew off, under the sink, and the small pex line
went inside a fitting that looked just like that used with a brass ferrul with copper.
Why would that type fitting fail? not tightened enough (plumbers did that in other places)

mainstreetprod is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wago terminals for residential line-voltage connections BigJimmy Electrical 3 05-22-2008 01:27 PM
NPT Connections Mike Warner HVAC 5 04-12-2008 11:33 PM
Floor beam failing? elvinj Building & Construction 8 01-25-2008 01:33 PM
Stab-in connections, ceiling fans, and computers tima2381 Electrical 15 04-01-2007 01:10 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.