So I am about to replumb my house. From the meter to my house is 3/4" 60 yr old galvanized pipe. Once it gets to the house it changed to 1/2" lines serving everything in the house. Example is a 1/2" supply to each fixture branching off of a 1/2" line. I have 82psi inside the house. When I use two fixtures like toilet and washing machine pressure drops to 12psi. I measure this with a water pressure gauge on the water hose bib.
I plan on replacing the 3/4" galvanized to 3/4" pex and run all my fixtures with separate 1/2" lines to each fixture attached to a 3/4" pex manifold. i am using Expandable Pex A so that i wont lose ID in the fittings. i am also will use a pressure reducer to keep pressure at 60psi.
Does anyone for see any problems with this upgrade?