Toro sprinkler head
I recently had 12 Toro TR 50 P sprinkler heads installed by a so called expert. After the installation of a 3 zone system 5, 4 & 4 heads the system starts out strong but slows down after 10 seconds. I was told it was the pump and then told it was the well. I called in an expert and was told that the guy installed the wrong heads and that they were for a golf course and the pump and well are fine. The pump pressure is 45 PSI. Do I need new sprinkler heads or is it possible to change the parts i received from sprinkler warehouse. Thanks, Marty