Brand: K-Rain SKU: RPS50
Product Overview
The K-Rain RPS50 is a compact 4-inch gear-driven rotor designed for smaller lawn and landscape zones that need more reach than a conventional spray head without moving up to a full-size residential rotor. Its 1/2-inch female NPT inlet makes it suitable for replacing many mini rotors and pop-up spray installations where the piping, pressure, and spacing support rotor operation.
The RPS50 provides adjustable part-circle or full-circle coverage from 40° to 360°. With the correct nozzle and pressure, its working radius ranges from approximately 18 to 33 feet and its flow range is approximately 0.8 to 3.8 GPM. The right-position-start design uses a fixed right stop and counterclockwise rotation, while the ratcheting riser lets the installer reposition the left starting point without digging up or rotating the body. A rubber cover helps keep dirt away from the adjustment area, and the non-flushing seal supports efficient startup.
This rotor includes a selection of interchangeable nozzles so the zone can be matched more closely to available flow, spacing, and precipitation requirements. An optional check valve can be added where low-head drainage is a concern. Final performance depends on the selected nozzle, operating pressure, head-to-head spacing, wind, and site elevation.
Key Features
- Compact 4-inch gear-driven rotor
- Adjustable arc from 40° to 360°
- Approximate 18- to 33-foot radius
- Approximate 0.8- to 3.8-GPM flow range
- 1/2-inch female NPT inlet
- Right-position start with ratcheting riser
- Interchangeable nozzle selection
- Optional check-valve compatibility
Common Uses
- Small and medium residential turf zones
- Replacing a compatible mini rotor
- Converting a properly designed spray zone to compact rotors
- Narrower areas that do not require a full-size 3/4-inch rotor
Compatibility and Installation Notes
Confirm that the zone can supply the required pressure and flow for every rotor operating at the same time. Use head-to-head spacing based on the selected nozzle and actual site conditions. Install the body level with the finished grade, flush the lateral line before inserting the nozzle, and use the current K-Rain adjustment instructions. Do not combine the RPS50 with unmatched spray heads or rotors on the same zone unless their precipitation rates are intentionally coordinated.
Frequently Asked Questions
What is the current RPS50 radius range?
K-Rain lists approximately 18 to 33 feet, depending on nozzle, pressure, and site conditions.
Can the RPS50 replace a standard spray body?
It may fit some 1/2-inch connections, but the zone must also provide suitable rotor pressure, flow, spacing, and matched precipitation.
Is a check valve included?
No check valve should be assumed unless the selected model specifically states that one is installed.
Why Buy the K-Rain RPS50 from Big Frog Supply?
The RPS50 gives customers a clearly identified compact-rotor option instead of forcing a choice between a short-radius spray and a larger 3/4-inch rotor. Big Frog Supply also carries K-Rain nozzles, adjustment tools, check-valve components, and larger rotor families for matching each zone to its actual radius and hydraulic requirements.
