1" or 3/4 " copper feed to RPZ
Is there much difference in a 1" copper feed from the meter, or a 3/4 in feed to the RPZ valve? Run is ~ 50 feet in the crawl space to outside RPZ,with 4- 45 degree and 2-90 degree copper fittings. Also, can I use galvanized unions for the RPZ valve, off of copper pipe? As mentioned pefore, I have 38-40 psi before RPZ valve.
Thanks
Paterjb