I have just acquired a new Rain Bird 12DSH 1/2 circle nozzle. How do I control the distance and radius of the two sprays?

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The distance is purely based on water pressure 15 PSI gets 9 feet, and 30 psi gets 12 feet. You probably have at least 30 psi so it is going to spray 12 ft. and you can't change that. The 1/2 circle nozzle is going to always spray 180 degrees, you can turn it to point where you want but you can't increase or decrease the pattern from 180 degrees. You can buy 1/4 and full circle nozzles for this sprinkler though. The last letter of the part number signifies that pattern. H=Half, F=Full, Q=Quarter so a 12DSH=half.

Posted on May 20, 2014

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Posted on Jan 02, 2017

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