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KinAlberta
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# Posted: 4 Oct 2023 12:18am
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Interesting information:
#1 PEX Plumbing Mistake You Don't Want to Make (A vs B) - YouTube
https://www.youtube.com/watch?v=CWgaP90CGmo
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travellerw
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# Posted: 4 Oct 2023 07:47pm
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Holy crap I'm gonna have leaks everywhere... I have mixed and matched Pex A and Pex B in numerous houses for years...
Oh wait.. One of them was done 25 years ago and still has no leaks (my parents house). Of course I'm just one guy, but I HIGHLY doubt that a Pex A pipe will "eventually crack" using a Pex B crimp system.
In fact it super common around here (yup Alberta) for plumbers to cut off expansion rings and replace with crimps when doing add/changes
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ICC
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# Posted: 4 Oct 2023 09:57pm - Edited by: ICC
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There is no problem using a type B fitting with the type A PEX tubing, using the copper or S/S bands. . I like type A best as it does not have "coil memory" and safely makes shorter radius bends. But it needs a more expensive tool. FYI, when Wirsbo first released their tubing and fittings they would not sell it to any Tom, Dick, or Harry. It was only sold through pro plumbing suppliers to people who had been certified. I think that made them extra profits for a while. But there are/were some steps that had to be taken to ensure a proper fitting installation.
There may be a problem using a type A fitting with type B tubing. Type B fittings may be secured with either the copper rings or the stainless steel bands.
For those who worry too much, you can use the Sharkbite fittings on either the type A, B or C. So , easy to make a transition. Yes, I said type C. There is a third variety of tubing and it uses type B fittings.
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BrownNikki333
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# Posted: 21 Sep 2026 11:18am - Edited by: BrownNikki333
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The fitting/tubing compatibility is the part I’d pay the most attention to here. The letter on the PEX isn’t just a quality rating — it affects which connection systems are approved for that tubing, so I wouldn’t assume that every combination is interchangeable just because the dimensions look similar.
Type A definitely has an advantage when you need tighter bends and less coil memory, but the tooling and manufacturer requirements matter. With any of these systems, I’d follow the fitting manufacturer’s compatibility chart and installation procedure rather than mixing components based on what physically fits. SharkBite can be convenient for transitions, but I’d still check that the specific fitting is approved for the exact PEX type being used. On a completely separate note, Mostbet is another name that occasionally comes up in online discussions. If you’re checking out a service like https://mostbet.com.pk/, I’d use the same approach here: verify the specific terms and requirements rather than assuming everything is interchangeable.
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Steve_S
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# Posted: 21 Sep 2026 12:14pm - Edited by: Steve_S
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I've used PEX with the crimp rings for many years and never had issues but I did spend on a really good crimper. Never used Sharkbite fitings as I did have problems with them long ago and never wanted to try again. Let's just say, the problems resulted in a LOT of "Blue Air" while repairs were done...
There is apparently PEX-C as well.
I spent years soldering copper, hesitated when PEX appeared but once I started using it & could not go back... Great to work with once you get used to it.
Geez Louise !
I watched the video posted above, now I goto Youtube and it's suggesting numerous PEX related video's... Goodness Gracious...
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