Pex is crap!! It leaks, splits and etc all by itself. Most of the time you cannot find fittings and etc. Copper is the only way to go. I will only use copper. Copper will last a lifetime.
"A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently and die gallantly. Specialization is for insects."---- Robert A. Heinlein