## How do I calculate sprinkler heads?

Consider the distance of each sprinkler head. If they distribute water in a circumference of 8 feet around, place them 4 feet apart to ensure every part of the lawn gets watered. Whatever the maximum spray distance of the sprinkler head, divide it in half to find out how far apart to place your sprinklers.

**How many gpm do you need for a sprinkler head?**

At different pressures, the sprinkler head and nozzle will consume different amounts of water. For example, at 35 pounds per square inch (PSI) the 5000 Series Rotor using the 3.0 nozzle will use 3.11 gallons per minute (GPM). If your home’s water capacity was 10 GPM, you could place 3 heads per zone.

**How do you calculate sprinkler heads per zone?**

Calculating Zones Each zone should include plants with the same watering needs, or an area of the lawn. Then, add up the necessary flow rate in GPM of all the sprinkler heads, divided by the GPM of your water supply. The resulting number will equal how many zones you need.

### How do I know what size sprinkler nozzle to get?

one will need a nozzle 1/2 the size. (Remember: when you reduce the RADIUS by 1/3 you reduce the AREA by a little more than half.) Avoid using rotors with nozzle flows that are less than 2.5 GPM, except in corners (quarter circle patterns). Flows under 2.5 GPM give very poor coverage due to the tiny water stream.

**What is the minimum distance between a sprinkler head and any obstruction?**

In a nutshell, NFPA 25: Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems says that objects that can block a sprinkler’s spray must be at least 18 inches away from the deflector.

**How many gallons per minute does a Rainbird sprinkler use?**

However, the flow rate of the Rain Bird PRS spray held steady at 2.1 gallons per minute, saving almost a gallon per minute over the non-PRS spray.

## How far apart should sprinkler heads be?

The distance between the sprinkler heads should not be more than 1 foot greater than the width of the planter. In other words, if the planter is 8 feet wide you would install half circle heads on both sides of the planter, not more than 9 feet apart from each other.

**How high should a sprinkler head be?**

The correct height for a sprinkler head is to have the top of sprinkler head just above the soil surface. No more than a quarter of an inch above the ground level. This lowers the tripping hazard, and a lawn mower can go past it without causing any damage.