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How a Sprinkler System Fits Together
A controller runs the schedule and opens each zone’s valve, which sends water to that zone’s heads. Use spray heads for small, defined areas and rotors for large open turf — never mix the two in one zone, since they apply water at different rates. Match every head in a zone to the same precipitation rate, and add a backflow preventer where code requires it.
Sprinkler FAQ
Spray head or rotor — which should I use?
Spray heads cover small or oddly shaped areas at a short radius (typically 4–15 ft); rotors throw 25 ft or more for large open turf. Keep them in separate zones — they apply water at different rates.
What is matched precipitation?
Every head and nozzle in a zone should apply water at the same rate, so the whole zone waters evenly. Mismatched nozzles leave some spots soggy and others dry.
What is a PRS spray head?
A pressure-regulated (PRS) spray head holds outlet pressure at a fixed value (commonly 30 PSI) to stop misting and save water where inlet pressure runs high.
Do I need a backflow preventer?
Most local codes require a backflow preventer so irrigation water cannot siphon back into your drinking supply. The required type depends on your code and elevation.
How many zones can one controller run?
By its station count. Group heads so each zone’s flow stays within your supply’s available GPM, then pick a controller with enough stations.
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