3/8" pex hot water line

[artnking]

I'm putting in a new bathroom that is 77 feet from my hot water heater. There is already a 3/4" cold water line running nearby. I need to run a new 77 ft. hot water line and plan to use PEX piping. It will be a single piece of PEX tube with two sweeping 90-degree turns.

Will 3/8" pex give me enough flow for a 3 GPM showerhead? I would like to use the 3/8" size if possible to give me hot water faster at this distance. Will it work?

Thanx! Art

 

[frodo]

run a 3/4'' hot pex line
the ID of 3/4 pex is 1/2'' [5/8]