PEX identification

[ericthet]

I haven't had a lot of experience with PEX and will be doing some work on a new property I acquired.

A lot of the building is older copper or galvanized but a newer bathroom addition (1990s) is PEX.
I am trying to figure out if it is PEX A or B and what tools are best to work with it.
I attached a photo of the current stuff.

I am going to be branching off a line or two to add a shower unit into the bathroom.

 

[Geofd]

I use Mil3 crimp tool with copper rings never had a problem if you use what's sold at home Depot, for domestic(drinking) water
You should be ok you can get it at a plumbing supply house also

 

[Twowaxhack]

You can crimp pex a or b

 

[Integrity Repipe]

Based on the appearance and typical markings, this looks like PEX-B piping, which is commonly used for water lines installed in the 1990s and beyond. If the pipe is stiff and doesn’t return to shape when bent, that’s another clue that it’s PEX-B rather than PEX-A. If you’re branching off this line for a new shower, you’ll want to use expansion or crimp-style fittings, as PEX-B does not expand like PEX-A. A crimping tool with copper or stainless steel clamps is typically the most reliable method for connections. If you’re unsure, it’s always a good idea to consult a PEX specialist, especially since mixing old galvanized or copper with PEX can lead to corrosion if not properly transitioned with dielectric fittings.