The Multiquip 1042668 Key Impeller 7X7X30 is a genuine OEM component designed for the ST6125D and ST4125D clean water submersible pumps. This small but critical drive key ensures the impeller is positively locked to the shaft, transmitting rotational force with zero slippage. As a direct OEM replacement sourced through Multiquip's authorized parts network, 1042668 meets the exact dimensional and material standards required for these units. Verify your model number against ST6125D and ST4125D before ordering to confirm fitment.
Key Features
- Genuine OEM Material Grade — Manufactured to Multiquip's exact hardness and dimensional tolerances for the impeller shaft interface, ensuring full torque transfer without deformation under load.
- Direct Shaft-to-Impeller Engagement — Sized at 7x7x30 mm to drop precisely into the keyway slot on the impeller shaft, restoring correct mechanical drive without any fitting or machining.
- Confirmed Fitment — Verified OEM replacement for Multiquip ST6125D and ST4125D clean water submersible pump models.
- Restores Full Pump Output — A worn or missing impeller key allows the shaft to spin independently of the impeller, causing a complete loss of flow; replacing it restores the pump to full rated performance.
- Cost-Effective Service Component — Replacing this single drive key during a pump rebuild or impeller service avoids the far greater cost of replacing the impeller or shaft assembly.
The impeller key is a small rectangular drive component that seats into matching keyway slots cut into both the pump shaft and the impeller hub. Its function is to mechanically couple the two so that the motor's rotational energy is transferred directly into the impeller, generating the water flow the pump is rated for. When this key shears, wears, or goes missing, the shaft rotates freely inside the impeller hub — the motor runs but the pump moves little or no water, and continued operation in this condition accelerates wear to both the shaft and impeller bore.
Part Details
| Part Number | 1042668 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Key Impeller 7X7X30 |
Compatibility & Fitment
| Name | Model |
|---|---|
| MQ Submersible Pumps Clean Water | ST6125D |
| MQ Submersible Pumps Clean Water | ST4125D |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
