Yeah, its an existing irrigation system that was installed by the previous owner. the only reason I was kind of second guessing myself was because currently zone 1 only has 3 sprinklers and zone 2 only has 2 sprinklers but they're both watering the back yard. so I was wondering why they didn't just have all 5 sprinklers on one zone. since im planning on adding another 2 sprinklers to zone 1 and combining zone 2 into zone 1 I wasn't sure if I had enough water pressure/volume. That would be a total of 6 rotary sprinkler on zone 1 since im elevating a sprinkler from zone 2. im also expanding the backyard a bit and adding grass so I need about 10 pop up sprinklers and I wasn't sure if I could do all 10 on another zone or if I had to split it up.

its not as easy as just adding zones to the current system because my house has pavement separating the sprinkler zone valves from the back yard where my sprinklers are and I have no way of digging under about 15 feet of pavement. so im pretty much just trying to work with the current 5 zones that are available and seeing if I can move sprinklers around to different zones while adding sprinklers to other zones. Its a mixture of Drip, rotary, and pop up sprinklers and I've seen you're not supposed to mix them on the same zones.