Well I was repairing a system that was installed 2 years ago, and this year all the stations had very limited or no pressure, so I checked the valves and 2 were burned, I replaced , i cut in front of the backflow and notice that the pressure was still low, so I replace the backflow and now I spent too much money and I cant find the problem I got 85 psi at the faucet but my sprinkler system is still flowing with low pressure, please I need some help Thanks
The problem must be before the backflow. Did you replace the ball valves? Sometimes they'll appear to be open all the way by looking at the handle but the ball inside is only partially open. Maybe the water meter valve isn't on all the way.