I need to relocate a couple of cast iron radiators in my own house. So before I turn the heat on in the house I would like to replace the pipes going to each radiator with barrier pex. I want to install a manifold for the supply and return. I am thinking a 1" manifold with 3/4" pex to each radiator.
I am a builder so Iím not shy to try this myself, just want to make sure I do it right the first time before the cold gets here. Hard to say cold weather when it has not been out of the 90's for weeks now, but I need to get this done so any help is appreciated.

Thanks
Bill Bonetto
Bonetto's Carpentry