When you say “system”, I did not replace the controller, but did go to MP rotors.
I was not consistently getting head to head coverage in my front yard with the original rotors due to design, wind and inconsistent water pressure. I decided to add a head to the front yard four rotor zone for better coverage. Adding another head of course reduces pressure, so I also switched to the MP rotors which I was told require less dynamic pressure.
I have been very happy with the coverage. My tuna can tests indicate it is a much more even coverage that before. In addition the water goes on at a much slower rate which is always better in irrigation.
I am not sure about the claim it reduces water use as to lay down an inch of water I need to run the system longer than the original rotors.
FWIW, Massey gave us the same spiel when doing our "free" inspection" two years ago. Masse wanted more than $230 to do my front yard which I DIY’d for less that $50. I use Massey for pest and yard, but I would get a second opinion and estimate if doing sprinkler work.
FWIW2, You can replace just the heads for about (I forget) $10/head (new rotor, case and 3/4 to 1/2 pvc threaded adapter), you must replace all heads in the zone. If you are just replacing the PGP rotors with MP rotors it is pretty simple work.
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