You mentioned that you never heard of preinsulated "normal pipe"
Not really but close enough.
Here is what I said: I've never heard of insulated PEX or any other normally used water line material. You add insulation to whatever you use but...
Take that in context to the OP questioning if he needed to replace the PEX he just installed with pre insulated PEX and there is no need for your link or reply.
Raucina, you said you wouldn't normally use it and if need you'd add the insulation; me too and IMO most DIYers will also. And I will now delete his latest post whining about that post being deleted.
Plus the fact that insulating a buried water line isn't going to stop water in it from freezing if the pipe depth is above the frost line for the area; unless you let water flow through it constantly and with sufficient flow to prevent freezing.
So there was no reason for you to mention the pre insulated stuff except to point out that I was uninformed/incorrect/wrong. Yet my comment that I never heard of it (implying it not being used for the OP's use), is a true statement. And the reason I haven't heard of it is due to no one using it normally to run a water line to their garage, or from their well to their house.
I deleted your personal attack off topic rant post mentioning my meds etc. and I deleted redwoods off topic reply with the picture.