#1 PEX Plumbing Mistake You Don't Want to Make (A vs B)

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I loved the fact you didn't waste our time dragging out your outstanding 6 min video into a half-hour monstrocity. Subscribed!!!

This comment is a correction of the video and not an attempt to knock it. Many plumbers believe what the video says. For any diy person, as long as you use crimp fittings, you’ll be fine regardless of which pipe you use. Pex a and pex b are compatible. The misconception is that pex a is expansion only and pex b is crimp only. However crimp fittings will work on either one. Expansion fittings are for pex a only. They did make pex b expansion (watts or zurn I think) but it never took off so maybe it didn’t work that well. Actually there’s 2 more kinds of pex but you don’t need to know about those unless maybe you’re doing radiant heating. If you don’t trust what I say go to the manufacturers website it’ll say the same thing

Great video! No gap in speech and to the point. You are an example to all youtubers sir!

Watched several vids on this pipe, You are the first telling me of more than two types and the need for correct fittings.

The best thing about this video is you got right to the point and kept the presentation moving. I appreciate that. Thumbs up!

Love this! Unlike most YouTube videos, this ione is jam-packed with nothing but information—no padding or fillers. Thank you!

If you're worried about flow rates with PexB, you can use 3/4." I had to replace some 1/2" copper that the whole house depends on and went this route with great success.

I’m gonna be adding pex into my existing pex system in a few weeks and I’m SO glad I watched this video first!! Thanks as always

You’ve helped America understand something that can be quite per”pex”ing 😂😂

I spoke with Uponor about what connection types could be used on their PEX A pipe. Yes the expansion fittings allow for the greater flow rate, however you can use crimp rings on Uponor too but it will reduce flow rate as you would use PEX B fittings. I needed the flexibility but did not want to invest in the expansion tool for the little plumbing needed from my project.

I plan on replumbing next year the old house I just bought and your vid has been most welcome, thank you.

Plumber here, I appreciate the work that went into this video. Great information and explanation. For continuity keep all your water distribution piping the same. That being said; Uponor Pex A can be crimped or expanded

The pacing on this presentation was fast but ABSOLUTELY CLEAR. Super clear speech (which is hard to achieve) plus super clear audio means that we're hearing exactly what you're telling us. Thank you! And what you're saying makes instant sense, especially when combined with clear images. So, great writing and storyboarding. I can't believe I'm saying this. I'm just a random person, what do I know? But man you are a great communicator. Plus now I get to go away understanding the PEX systems way better. This will be with me for a lifetime, I'm serious.

There is pex A,B and C. PEX A is made using the Peroxide, or Engel, method. PEX B is formed using Silane, or Moisture Cure, method. This is the most common PEX pipe type out there. PEX C is created using the Electronic Irradiation, or Cold, method of cross-linking. Roth is Pex C, that pipe is much more chemical free on the inside, a little more stiff, can be used on both drinking water and heating system. But this Pex you cannot heat up to repair it like you can with feks Sanipex.

This video was awesome and presented at the perfect speed. I was wondering about the different PEX options and this was great. Thank You

Good Video. I am currently replacing all the patched up copper in my 1973 Airstream with Pex B. It has worked out good because the small vice-type crimper fits in the small confines I am dealing with. It is definitely NOT the "afternoon" project some people online claim- I have been working at it for a long time and it takes a lot of planning ahead to make the minimal amount of couplings in the really small spaces. The volume restriction in my trailer will not be an issue since there were originally fittings right off the water pump that reduced the copper system to effectively 3/8" anyway. In a house I would definitely step up to 3/4" with Pex B.

My house piping is copper and I've kept it that way thru the years, now i'm even happier that I did.

I've seen older versions of Uponor's PEX A use crimp fittings. Note that just having crimped fittings doesn't automatically mean it is PEX B.

Thanks for the awesome breakdown of this. Fast, easy watch and no unnecessary info. Great job.