Our house in Maine was full pex, with the manifold…. And I was very happy with it. Never even worried about freezing…This is the first home I've had With it and I really like it. It did withstand that Arctic freight train we had coming through here February a couple years ago!
Some did freeze up but they didn't bust !
Edit................................ And mine is a manifold system.
This house really needs to be done… you can see under the house where its been repaired several times over the years, several types of materials..