Full Sprinkler U Fitting W/ Autodrain Low Water Pressure, Rain Bird Sprinkler System - What Should I Do?

Low Water Pressure, Rain Bird Sprinkler System - what should I do? - full sprinkler u fitting w/ autodrain

I have a Rain Bird sprinkler system. The water pressure was very low. Unlike Wisconsin, there is almost no rain for a month and a half or more than now. the pressure of irrigation is very low, the pump filled with water, and very few leaves. What could be wrong. I know I can call the gardener, but honestly, I do not know 'confidence in him, and I do what I can imagine the first problem, and I did not call.