Increasing diameter increases flow, not pressure. Pressure is
determined by head, or height of fixture relative to height of water
source if no pumps are used. Increase pressure by having your
town buy a new water tower.
Increasing to 3/4" would be useful for multiple showerhead fixtures.
I hadn't mentioned it for simplicity's sake, but since you've brought
this up, the idea of having multiple showerhead fixtures (actually,
purchasing and installing one of those "super shower" systems) at some
point in the near future, is also a consideration leading to my
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.