Sta-Rite J105-42P Impeller
This is the J105-42P impeller, sized for Sta-Rite PL-Series convertible jet pumps. Impellers wear from cavitation, sand and grit in the water, and simple age, and a worn one is one of the most common reasons a Sta-Rite pump loses pressure or flow even though the motor still runs fine.
Because the impeller sits directly on the motor shaft, this is also the part most likely to need replacing after the pump has run dry or ingested debris that jammed or chipped the vanes. Inspect the mechanical seal and diffuser or volute for matching damage at the same time, since a failed impeller often takes the seal with it.
Key Features
- Genuine-fit Sta-Rite J105-42P replacement impeller
- Molded for a balanced, vibration-free spin on the motor shaft
- Built for Sta-Rite PL-Series convertible jet pumps
- Restores lost flow and pressure caused by a worn or chipped impeller
- Direct fit replacement, no pump modification required
Applications
- Restoring flow and pressure on a Sta-Rite pump that has lost performance
- Rebuilding Sta-Rite PL-Series convertible jet pumps
- Replacing an impeller chipped or jammed by sand, grit, or a dry-run incident
- Routine wear-part replacement on residential and light-commercial water pumps
Specifications
- Brand: Sta-Rite
- Manufacturer Part Number: J105-42P
- Part Type: Impeller
- Fits: Sta-Rite PL-Series convertible jet pumps
- Quantity Per Pump: 1
- Condition: New
Frequently Asked Questions
Q: Can a chipped impeller be repaired instead of replaced?
No. A chipped or cracked impeller is out of balance and should be replaced rather than repaired; running an unbalanced impeller accelerates wear on the shaft seal and motor bearings.
Q: Is this impeller threaded or keyed onto the shaft?
Sta-Rite impellers in this class are typically threaded onto the motor shaft. Confirm the thread size against the original part, since it varies across pump lines even at the same horsepower.
Q: How do I know if my pump needs a new impeller?
Falling flow or pressure with the motor still running normally, a grinding or rattling noise, or visible chips and cracks in the old impeller are the usual signs. A pump that hums but moves no water at all can also mean a seized or badly damaged impeller.
Q: Do I need to replace the seal at the same time?
Not always, but inspect it while the pump is open. An impeller that failed from a dry-run event or debris often damaged the mechanical seal as well, and it is cheaper to replace both while the pump is already apart.
Not sure this is the right part? Send us a Picture of the Pump Plate on your pump and the CLR Marine team will confirm the correct impeller.
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