Richdel 530 Sprinkler Head Adjustment: Find the +/- Screw Under Cap

Adjusting Old Richdel 530 Rotors: Arc Reduction Screw

Heads spray half on lawn, half on street. Model "Richdel 530" on cap—likely an older Irritrol/Rain Bird variant.

Adjustment Location

Look at top of cap: small hole with + and – markings. Insert small flathead screwdriver.

• Turn toward – (minus) to reduce arc.
• Turn toward + (plus) to increase arc.

If No +/- Screw

Head may be fixed-arc. Check Irritrol CR500 spec sheet for similar model.

Photo Help

Email top-of-head photo to mwelch@chartermi.net for exact ID.