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Old 04-16-2015, 02:37 PM   #1
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PEX: Which is better, cinch or crimp?


The prices for each are a bit different, so is there actually a difference in effectiveness or installation effort between the two?
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Old 04-16-2015, 03:33 PM   #2
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Both work equal, depends on what avalible in your area.
I use the crimp because that what every box store, hardware store stocks in my area.
I bought a high dollar battery operated cinching tool only to find out no one stocks the rings for it.
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Old 04-16-2015, 04:09 PM   #3
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Wirsbo uses expansion rings, which requires a special tool to install. So that is a third system. I have been pretty happy with my Wirsbo fittings and rings, easy to install, pretty foolproof, but the tool is a bit pricey.
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Old 04-16-2015, 04:14 PM   #4
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I've never used the cinch rings but have a couple that a plumber installed. No problems with them. Like Joe said about the crimp rings. The are available and the tools don't seem as expensive. You will want to consider getting the crimp ring cutter. There is a bit of a learning curve getting those crimp rings positioned properly. They will leak if they don't go on straight which you will know as soon as you turn the water back on. Then you will need to cut the old ring off and put on a new one.
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Old 04-16-2015, 06:55 PM   #5
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Quote:
Originally Posted by Daniel Holzman View Post
Wirsbo uses expansion rings, which requires a special tool to install. So that is a third system. I have been pretty happy with my Wirsbo fittings and rings, easy to install, pretty foolproof, but the tool is a bit pricey.
hey dan ..iam a wirsbo fan as well ... we use this
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Old 04-16-2015, 08:14 PM   #6
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ben crimping maybe 10 yrs as that system was available first, one benifit of the cinch rings is one tool will work with all sizes of rings, but crimps generally are one tool per size.
If I ever need to replace my tools I will probably switch
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Old 04-16-2015, 11:54 PM   #7
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I second the "get the system that is available locally " option. I crimp but that is what everyone stocks here.
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Old 04-17-2015, 07:29 AM   #8
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Ben, that is a very nice expansion tool, but even more expensive than the manual tool, which is about $300 last I checked.

One small detail about crimp rings to consider. The fittings that use crimp rings are smaller than the inside diameter of the PEX, so you get friction loss at each fitting. The Wirsbo system expands the PEX to fit over their fittings, so the inside diameter of the Wirsbo fittings is the same as the inside diameter of the PEX, hence very little friction loss at each fitting. You might notice the extra losses using the crimp ring system in a long run with a lot of fittings.

The Wirsbo system requires the use of PEX-A, which is more flexible (and can tolerate expansion better) than PEX-B and PEX-C. I believe PEX-A, B or C can be used with the crimp ring system, but due to the complexities of matching the crimping system and the PEX, my suggestion is to purchase all your components from a plumbing supply store where they actually know something about the products they sell.
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Old 04-17-2015, 06:09 PM   #9
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Quote:
Originally Posted by Daniel Holzman View Post
Ben, that is a very nice expansion tool, but even more expensive than the manual tool, which is about $300 last I checked.

One small detail about crimp rings to consider. The fittings that use crimp rings are smaller than the inside diameter of the PEX, so you get friction loss at each fitting. The Wirsbo system expands the PEX to fit over their fittings, so the inside diameter of the Wirsbo fittings is the same as the inside diameter of the PEX, hence very little friction loss at each fitting. You might notice the extra losses using the crimp ring system in a long run with a lot of fittings.

The Wirsbo system requires the use of PEX-A, which is more flexible (and can tolerate expansion better) than PEX-B and PEX-C. I believe PEX-A, B or C can be used with the crimp ring system, but due to the complexities of matching the crimping system and the PEX, my suggestion is to purchase all your components from a plumbing supply store where they actually know something about the products they sell.
well if you do 3/4 and 1" with the manual tool you will soon by the power expander...we are doing a 66 unit condo project I let the young pups do the manual thing..
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