Murrieta, CA Building Safety: Fire Sprinkler Requirements (2026)

720 adopts NFPA 13D, 2025 Edition, the Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes, and layers on city-specific amendments under Ordinance 626-25. 3 requires the homeowner to keep on the premises at least one spare sprinkler of each type installed, stored in a cabinet where the temperature never exceeds 100 degrees Fahrenheit, along with a sprinkler wrench sized to remove and reinstall every head style on the property so damaged or activated sprinklers can be swapped promptly.

2 bars a separate control valve on the system piping unless it is supervised by a central station, proprietary, or remote station alarm service. 6 requires a water flow switch on the sprinkler riser above the check valve that trips both a local waterflow alarm bell, at least six inches in diameter and mounted on the building exterior, and the interconnected smoke alarms inside the residence, with a retarding delay of 15 to 45 seconds before activation to prevent nuisance alarms. 400 requires automatic sprinklers throughout new buildings of any occupancy that are 3,600 square feet or larger or more than two stories, with narrow carve-outs for small detached agricultural buildings and shade structures set back 50 feet or more from property lines.