When I bought my house, I went out and bought K-rain K-2 rotors for my front yard. I was pretty satisfied with the results I was getting. However, I began listen to others and reading others' forums and based on name, switched to Rainbird 5004's and now to Hunter PGP's. The result - wasted money following a name! I never really had a problem (other than my own error) out of my K-rain's. The distance of throw and the "around the head" coverage is just as good and maybe better than the Hunters and...
In my most recet experiences, the Rainbird 5004's have outperformed the Hunter PGP's - nozzle coverage and distance of throw.
I have both the Hunter PGP (#7 nozzles) and the Rainbird 5004 (#3 nozzles)installed in my yard. Both are good, however the throw of the Rainbirds has proven to be much longer than the Hunters. As a matter of fact the K-rain K-2's have a longer throw than the Hunter PGP's. It takes more than just a name and track record to remain on top!
Good question!; I need an answer to the same question about the same situation!
I have a front yard that is 30' x 50' (1500 sq ft) and I am not sure which type or rotor to use. I currently have 5 K-rain K2 rotors and 4 K-rain K1 rotors but I'm not sure which ones to use or where exactly should I place them. Any Ideas?