The Multiquip 0489312300 is a genuine OEM O-Ring Volute Casing Dia 3.1 x 228 designed for Multiquip QP-series trash pumps including the QP-301TY, QP-301TA, QP-301TH, QP-40TE, and QP40TH. As a direct OEM replacement, this seal is manufactured to the exact dimensional specification required for a proper fit at the volute casing joint. Sourced directly from Multiquip, part 0489312300 ensures the sealing interface performs as intended across all compatible pump models. Keep a spare on hand to minimize unplanned service interruptions on the job.
Key Features
- Exact OEM Sealing Specification — Manufactured to the precise Dia 3.1 x 228 cross-section required at the volute casing, ensuring correct compression and a leak-free seal.
- Direct-Fit Volute Casing Replacement — Seats directly into the volute casing groove on compatible QP-series trash pumps without rework or modification to the housing.
- Broad QP-Series Compatibility — Confirmed fitment for QP-301TY, QP-301TA, QP-301TH, QP-40TE, and QP40TH Multiquip trash pump models.
- Preserves Pump Prime and Flow — A properly seated volute casing O-ring maintains the pressure boundary inside the pump housing; a damaged or worn ring causes prime loss and reduced discharge flow.
- Genuine Multiquip OEM Part — Supplied as an authentic Multiquip component, so the material grade and dimensional tolerances match the original seal installed at the factory.
The volute casing O-ring creates the primary static seal between the volute casing and the pump body, containing fluid pressure within the wet end of the pump. Without an intact seal at this joint, the pump loses its ability to maintain prime, and water can bypass the impeller rather than being directed to the discharge port — resulting in a significant drop in flow rate and pumping efficiency. Replacing a hardened, cracked, or compressed O-ring with a correctly sized OEM seal like the Multiquip 0489312300 restores the pump's pressure boundary and keeps the volute casing seated and leak-free under operating load.
Part Details
| Part Number | 0489312300 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | O-Ring Volute Casing Dia 3.1 x 228 |
Compatibility & Fitment
| Name | Model |
|---|---|
| MQ Trash Pumps | QP-301TY |
| MQ Trash Pumps | QP-301TA |
| MQ Trash Pumps | QP-301TH |
| MQ Trash Pumps | QP-40TE |
| MQ Trash Pumps | QP40TH |
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.
