The Multiquip 0489403400 is a genuine OEM Casing O-Ring designed for QP3 series trash pumps and centrifugal pumps, including the QP3TB, QP3THX, QP3TK, QP3TS, QP3TH, and QP3TZ. As a direct Multiquip OEM component, it is manufactured to exact material and dimensional specifications, ensuring a proper seal at the pump casing interface. Sourced through DHS Equipment, this part is verified by part number to match your QP3 series machine and ships ready to install.
Key Features
- OEM Seal Material Grade — Manufactured to Multiquip's exact compound and durometer specification, so the o-ring compresses and seals correctly against the pump casing without cracking or extruding under pressure.
- Drop-In Casing Fit — Dimensioned to seat precisely in the casing groove, allowing straightforward installation without stretching or trimming during reassembly.
- Broad QP3 Series Coverage — Confirmed fitment across QP3TB, QP3THX, QP3TK, QP3TS, QP3TH, and QP3TZ, covering multiple engine configurations within the QP3 pump family.
- Maintains Pump Prime and Discharge Pressure — A properly sealed casing prevents air ingestion and internal leakage, allowing the pump to build and hold prime efficiently and deliver consistent discharge flow.
- Leak Prevention at the Casing Joint — A worn or compromised o-ring at this location causes fluid bypass between casing halves, resulting in loss of prime, reduced output, and external leakage at the pump body.
The casing o-ring creates a pressure-tight seal between the pump casing halves, preventing fluid from bypassing the impeller or leaking externally at the casing joint. Without an intact seal at this location, the pump loses the ability to maintain prime and sustain discharge pressure, directly reducing pumping output and efficiency. When this o-ring shows signs of cracking, deformation, or compression set, replacing it promptly restores the pump's ability to move water effectively and prevents progressive casing wear.
Part Details
| Part Number | 0489403400 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Casing O-Ring |
Compatibility & Fitment
| Name | Model |
|---|---|
| Trash Pumps | QP3TB |
| Trash Pumps | QP3THX |
| Trash Pumps | QP3TK |
| Trash Pumps | QP3TS |
| Trash Pumps | QP3TH |
| Trash Pumps | QP3TZ |
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.
