Ours is set to about 40psi, I’m sure it’s not exact but it’s in the neighborhood and I’m satisfied with the water supply. For several years I used a cheap non-adjustable one and always felt it limited the flow. After I bought the adjustable one I’m sure of it. The old one is now in my spares box as a backup.
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks