Upgrade spray heads to rotary nozzles

Quick take: Big yard or many zones? Get a pro to convert it → Check your rebate first: some require a minimum number of nozzles.

Check this first

Convert the whole zone. Hunter says to replace all sprinklers on a zone and adjust the run time: the precipitation rate is much lower than sprays, so run times are similar to stream rotor zones (Hunter).
Match the radius. Standard MP Rotators cover 8–35 ft depending on model (Hunter); Rain Bird R-VAN18 covers 13–18 ft and fits 1804/1806/1812 spray bodies (Rain Bird).
Set the arc. Point the left edge indicator (flat side) at the left edge of the area. With the zone running, turn the arc ring clockwise for more, counter-clockwise for less (Hunter).
Set the distance. The radius screw cuts throw by up to 25% (clockwise to shorten) (Hunter).
Watch the pressure. Hunter says pressure consistently above 55 PSI shortens nozzle life and reduces uniformity (Hunter).

Female-thread rotary nozzle; pick radius and arc on the listing. Specs

13–18 ft; fits Rain Bird 1804/1806/1812 spray bodies; arc and radius adjust by hand. Specs

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Converting several zones at once? The EPA suggests hiring an irrigation professional certified by a WaterSense labeled program (EPA WaterSense).

Steps summarized from the linked manufacturer and EPA pages (checked 2026-10-18). If your valve or head brand differs, follow its manual.