1-1/2" Impact Rain Gun – Full/Part Circle | 12–16mm Nozzle Set

RK-67 – 1-1/2" Impact Rain Gun for High-Flow Commercial Field Irrigation

The RK-67 impact rain gun is built for large-scale commercial irrigation where high flow and long throw are priorities. With a 1-1/2" female NPT inlet and nozzle options ranging from 12mm to 16mm, this rain gun delivers up to 103 GPM and reaches a radius of over 108 feet — ideal for large row crop fields, broad pastures, and orchards. Size your supply line to match your pump output: 2" for up to 50 GPM, 3" for up to 100 GPM. DOES NOT WORK WITH A GARDEN HOSE.

Key Features & Benefits

• Interchangeable nozzle set (12, 14, 16mm + 5mm auxiliary) — match flow to your pump without replacing the head
• 40–103.3 GPM flow range — handles the output of mid-to-large agricultural pump systems
• 65.6–108.2 ft radius — one of the widest throws in its class, reducing moves per cycle on large blocks
• 23° trajectory — low-angle throw improves distance and wind resistance in open field conditions
• Full and part-circle operation — flexible coverage for full fields and irregular plot edges
• Spring arm impact drive — low-maintenance drive mechanism that operates reliably across 30–70 PSI
• Aluminum body and arm — lightweight and corrosion-resistant for extended outdoor use
• Brass nut, tube, and diffuser — durable at high-wear connection and diffusion points
• Stainless steel spring and pin — resist corrosion and fatigue under continuous field operation
• 120 ft recommended spacing — wider grid spacing means fewer heads and less pipe for the same area

Supply Line Requirements

Proper supply line sizing is critical for this rain gun's performance:

• Use a 2" supply line for flow rates up to 50 GPM
• Use a 3" supply line for flow rates up to 100 GPM

DOES NOT WORK WITH A GARDEN HOSE.

Spare Parts Available:

• RK-67 Replacement Washer Kit: RK67-WASH
• RK-67 Diffuser Arm and Screw: RK67-DIFF
• RK-67 Secondary Diffuser and Arm: RK67-DIFF2