How many different brands of sprinkler heads have you guys found on a job? Finished replacing 57 heads on one job last week and I found no less than 7 different brands of heads. These included Rain-Bird, Hunter, Toro, Nelson, Irritrol, Buckner and Weather-Matic. This system dates back to 1975 and has had many different service companies service the system evidently. some of these heads were brass. We replaced with RB 1804PRS with sprays and 1804's with MP-Rotators. System works beautifully now. All the replacements were easy and relatively effortless but I did have an interesting collection of junk when I was finished!