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Old 02-06-2013, 11:28 AM   #15
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Originally Posted by Steve Ownby View Post
If you can access the backside of the wall where the fitting is it would certainly make it easier to repair. I would think that the fitting should have some type of female threaded hookup point on the back side that could be just screwed off if you can get access to it. If so then it could be as simple as just screwing a new one on. It you have to cut the PEX then you're faced with how to reattach the fitting. PEX fittings are typically crimped on with a special tool. There are connectors called
yes, we can get to the back wall. it is a very small/tight area, a cabinet under the refrigerator. we have to remove a heater tube temporarily to get a good look at the PEX tubing. It doesn't look like there is anything that screws in just tubing and connectors. Is there a good crimping tool that can get in tight/small spaces?
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Old 02-06-2013, 11:33 AM   #16
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I have seen some connectors that "Grab" a plastic pipe, either you shove it in and the fingers grip or, (I like this kind better) you loosen a cap, not unlike the nut on a compression fitting, slide it over the pipe, shove the pipe onto the barbed connector and then tighten the cap back on locking it in with,, Well, as I said, it's a compression fitting.

Would these work on the older pipe, and on PEX? (Frankly I do not know)
yes, i've seen the ones you loosen a cap and slide the pipe in then tighten it. we've used them on our garden hosing. once we are ready to install the poly to PEX adapter with a little bit of new PEX pipe, is there a specific kind of crimper we will need? It is a very tight/small space to work in so I think we would need something adaptable. I will look into the grab connectors as that may save us from having to buy a crimping tool, however what would we do for the PEX to poly adapter? Don't we still need those? Thanks!
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Old 02-06-2013, 11:57 AM   #17
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Originally Posted by cozycamping2

yes, we can get to the back wall. it is a very small/tight area, a cabinet under the refrigerator. we have to remove a heater tube temporarily to get a good look at the PEX tubing. It doesn't look like there is anything that screws in just tubing and connectors. Is there a good crimping tool that can get in tight/small spaces?
I guess the next question is, does it look like there is any "slack" in the plumbing to take the inlet fitting loose from the body & pull it out a few inches to work on it?
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Old 02-06-2013, 08:13 PM   #18
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yes, i've seen the ones you loosen a cap and slide the pipe in then tighten it. we've used them on our garden hosing. once we are ready to install the poly to PEX adapter with a little bit of new PEX pipe, is there a specific kind of crimper we will need? It is a very tight/small space to work in so I think we would need something adaptable. I will look into the grab connectors as that may save us from having to buy a crimping tool, however what would we do for the PEX to poly adapter? Don't we still need those? Thanks!
The smallest crimper is not very small. Typically, you need to plan carefully and build a tubing assembly out in the open and that ENDS in a place you can use the crimper. In other words, pre-cut, pre-crimp everything you can, put the assembly in place, and the final crimp is where you can get the tool into place. A lot of visualization before actually doing the work.

Alternatively, you can use this:

sharkbite pex to polybutylene
SharkBite U4008 Polybutylene Conversion Coupling 1/2" x 1/2" SharkBitePlumbing.com

The trick is finding one locally .....

Also, push-on fittings (like Sharkbite) are a great invention but aren't as reliable as a crimp in an area prone to flexing or vibration.

You may find this video helpful:
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Old 02-08-2013, 06:19 PM   #19
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The smallest crimper is not very small. Typically, you need to plan carefully and build a tubing assembly out in the open and that ENDS in a place you can use the crimper. In other words, pre-cut, pre-crimp everything you can, put the assembly in place, and the final crimp is where you can get the tool into place. A lot of visualization before actually doing the work.

Alternatively, you can use this:

sharkbite pex to polybutylene
SharkBite U4008 Polybutylene Conversion Coupling 1/2" x 1/2" SharkBitePlumbing.com

The trick is finding one locally .....

Also, push-on fittings (like Sharkbite) are a great invention but aren't as reliable as a crimp in an area prone to flexing or vibration.

You may find this video helpful:
Polybutylene plumbing repair - YouTube

There are others ..... search "repairing polybutylene"
Thank you! We found the sharkbite conversion coupling on Home Depot's website. We may have to order it online. I think we may go with a coupling of some sort either the one you recommended or there are others out there. It would probably just be easier than having to crimp. However, there is one area I think we will HAVE to use a crimp ring and crimper, where the new or repaired inlet valve meets the newly installed PEX tubing. Right? I wanted to try to avoid crimping all together, but I am not sure how else to attach the new inlet to the PEX pipe.
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Old 02-08-2013, 06:31 PM   #20
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In all likelihood, sooner or later, you will need to crimp some Polybut to PEX or PEX to PEX. I needed to do a fair amount (1997 HR Endeavor ... new faucets, water heater, etc.) and bought the $50 crimp tool. Compared to having someone else do the fittings I am WAY ahead. Just sayin' ....

BTW, crimp tool works great but it has a small learning curve .... buy a bag of rings and some spare PEX .... make a few trial crimps.

Also, you may want to buy the "ring splitter" in case you "oops". About $10, allows splitting an installed ring so you can reuse a coupler or similar fitting.

I keep adapters, rings, crimp tool, splitter, 1 elbow, 1 straight PEX coupler and 10 feet of PEX in coach.

BTW, if you go to Home Depot or Lowes and you look for the Pex to Polybut parts (including Sharkbite) it is probably on the shelf and none of the personnel know what it is. It's a 15 year old technology that lots of people are totally unfamiliar with. Poke around on the shelves. Look at product pics before you go and you will probably recognize it. I didn't need to order anything online .... it was there but had odd labeling.
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