The Multiquip 0489312550 Casing O-Ring is a genuine OEM replacement designed for QP402H and QP303H centrifugal pumps. Sourced directly from Multiquip, this O-ring is manufactured to the exact material grade and dimensional tolerances required for a proper casing seal on these pumps. It is a direct-fit component for QP402H and QP303H models, installing exactly as the original with no guesswork. Keeping this seal in good condition is essential to maintaining pump output pressure and preventing water loss at the casing joint.
Key Features
- Precision-Matched Seal Material — Manufactured to OEM compound and durometer specifications, ensuring the correct compression and sealing performance specific to centrifugal pump casing applications.
- Drop-In Casing Fit — Profiles and dimensions match the original casing groove exactly, allowing straightforward installation without trimming or adjustment.
- Confirmed Fitment for QP402H and QP303H — Verified for Multiquip QP402H and QP303H centrifugal pump models; check your model number before ordering to confirm compatibility.
- Leak Prevention at the Source — A worn or cracked casing O-ring allows pressurized water to escape at the pump housing joint, causing pressure loss and potential pump damage; this genuine replacement restores a full, tight seal.
- Genuine OEM Part — Supplied as an authentic Multiquip component under part number 0489312550, meeting the same standards as the original part installed at the factory.
The casing O-ring forms a watertight seal between the pump casing halves or between the casing and volute, preventing water from escaping the pressurized chamber during operation. When this ring deteriorates — through age, heat cycling, or chemical exposure — the pump loses prime, output pressure drops, and water can leak externally at the casing joint. Replacing a worn casing O-ring is one of the most straightforward pump repairs and is critical to restoring full pumping capacity.
For fitment questions or help confirming this part is right for your machine, contact the DHS Equipment team.
Part Details
| Part Number | 0489312550 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Casing O-Ring |
Compatibility & Fitment
| Name | Model |
|---|---|
| Centrifugal Pumps | QP402H |
| Centrifugal Pumps | QP303H |
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.
