Set the Left Stop First
Follow the brand’s left-edge procedure before dialing the right stop—backwards order causes confusion.
Match Nozzle to Arc
Nozzle charts assume specific arcs. Changing arc without re-nozzling skews precipitation.
Check Collars and Screens
Debris holds arcs short and causes side spray.
Walk the Pattern at Night
Darkness reveals mis-throws toward windows and walks.
Frequently Asked Questions
Why does my arc slip?
Worn parts or wrong tool technique—rebuild or replace.
Can I reduce radius without a new nozzle?
Slightly—too much kills uniformity.
