How many sprinklers do I need?
Also asked, how many sprinklers do I need calculator?
The number is how many sprinkler heads you need to spray in a full circle, 360 degrees. Count the dots on the borders marked with one-half circles, and make a note of that number. Count the corner dots with one-quarter circles, and write down that number.
Then, how many sprinklers per zone do I need?
The chart will tell you the radius of the spray and GPM of flow for different pressures. Divide the GPM flow through your water system by the GPM flow through the sprinklers at your available pressure. Round down the nearest whole number. This is the maximum number of sprinklers you can use per zone.
Types of Sprinkler Heads Spray heads: Best used for small to medium sized lawns and/or in systems that will be operating with pressure between 20 - 30 PSI. Because of the lower PSI the distance of the spray rarely exceeds 15ft. Meaning that spray heads should never be placed further than 15 ft.