Pressure from the city is 120psi (1" line). I have a single pressure regulator that currently feeds both the house and the sprinkler / outside water. When the sprinkler system and/or outside water is on the pressure noticeably drops inside the house. If I tee off the 120psi line into two pressure regulators I'm thinking that the pressure drop would no longer occur inside the house since that 120psi would feed two 60psi circuits (3/4" line). I suspect I may not be analyzing this correctly which is why I ask. I have to rework the plumbing in that area so researching in advance. Is my thinking here correct? Thanks!