Sta-Rite U30-542SS Diffuser
The Sta-Rite U30-542SS is a replacement diffuser. The diffuser sits around or just past the impeller and directs the water it flings outward into an organized flow toward the discharge port, converting the impeller's spin into usable pressure.
A worn or cracked diffuser lets water recirculate internally instead of moving out through the discharge, which shows up as a pump that runs but delivers noticeably less pressure than it used to. Replacing it along with the impeller during a rebuild is common practice, since both parts see the same wear conditions.
Key Features
- Genuine-fit Sta-Rite U30-542SS replacement diffuser
- Directs impeller output into a smooth, pressurized flow toward the discharge
- Direct fit replacement for the original Sta-Rite part
Applications
- Restoring lost pressure on a Sta-Rite pump with a cracked or worn diffuser
- Rebuilding the Sta-Rite pump this part is cataloged for
- Routine wear-part replacement during a pump rebuild alongside the impeller and seal
- Fixing an internal leak or recirculation loss inside the pump body
Specifications
- Brand: Sta-Rite
- Manufacturer Part Number: U30-542SS
- Part Type: Diffuser
- Quantity Per Pump: 1
- Condition: New
Frequently Asked Questions
Q: Will this fit a different horsepower pump in the same series?
Match the exact part number on the old part rather than assuming pumps of similar size share the same component.
Q: What causes a diffuser to crack?
Age, thermal cycling, running the pump dry, and years of sand or grit passing through the water all contribute. A sudden crack after a hard freeze is also common on pumps left full of water in cold weather.
Q: Can a cracked diffuser be glued or patched?
No. A cracked diffuser should be replaced rather than repaired, since a patch will not hold up to the pressure and vibration inside a running pump.
Q: How do I know if my diffuser needs replacing?
Reduced pressure or flow with the motor and impeller both in good condition is the main sign, along with visible cracks, chips, or wear where it seats against the pump body.
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 diffuser.
CLRMarine
