The typical number of sprinkler heads per zone depends mainly on water pressure, flow rate (GPM), and the type of sprinkler heads used. Here are the key points:

• Generally, a zone can accommodate between 5 to 10 sprinkler heads, with each head covering about a 15-foot radius

• Traditional systems often have 5 to 6 rotary heads or 8 to 10 spray heads per zone to ensure full coverage

• The exact number depends on your water supply capacity. For example, if your home's water capacity is 10 GPM and each sprinkler head uses about 3 GPM, you could run 3 heads per zone

• Sprinkler heads operate simultaneously in a zone, so too many heads can reduce pressure and watering efficiency

• Some advanced systems like Irrigreen use one smart head per zone by digitally mapping the lawn and adjusting spray patterns, reducing the number of heads needed

• A common design pressure used for calculations is 40 PSI, with the number of heads limited by the total GPM available from your water service

In summary, for a typical residential lawn irrigation system, expect about 5 to 10 heads per zone, but the precise number should be calculated based on your water pressure, flow rate, and sprinkler type to ensure efficient coverage without pressure loss

. Consulting a professional or using a sprinkler zone calculator can help optimize your system.