PEX Tubing questions

I don't remember the brand of my pex, but I can see where it comes out of the floor, it is black with a thin red stripe. It is however, 5/8" tubing. My runs vary. They are 220', 320', 344', 350' and 163' running through my office and bench area. You definitely don't need your heating system rigged up, but if you had the runs tied into the manifold it would be nicer because they will enter the floor properly. Otherwise just make sure you have them tied into position really good. You can see in my pics the general idea.

I just found a cut off piece. It's kind of rubbed off but I think it is Otega, ViegaPex Barrier. It has a bunch of numbers that don't mean anything to me! It is made in the U.S.A.