I found out I have two pressure regulators installed on the main water line, I'm guessing this is not normal.
Is there a reason to do this?

He is what I have, water meter, gate valve, pressure regulator, 100ft of 1 1/4 PVC, then at entrance of house, 1" copper, gate valve, pressure regulator.

I have to replace the main PVC line because it has a leak. Where is the pressure regulator normally located?

Also, I measured the pressure after the second regulator and is is 90 PSI.
That seems a little high to me.
what should it be?