The Multiquip 4000510 O Ring is a genuine OEM sealing component designed for the QP-401 trash pump. Sourced directly through Multiquip's authorized parts program, this O Ring is manufactured to the exact material grade and dimensional tolerances specified for the QP-401, ensuring a leak-free seal at the connection point it serves. If you're replacing a worn, cracked, or compressed O Ring on your QP-401, part number 4000510 is the correct factory-specified component for the job.
Key Features
- OEM Material Spec — Manufactured to the exact compound and durometer rating required for the QP-401's operating pressures and fluid contact, so the seal performs as intended from day one.
- Drop-In Fitment for QP-401 — Dimensionally matched to the sealing groove on the QP-401 trash pump, so it seats correctly without stretching, trimming, or modification.
- QP-401 Compatibility Confirmed — Verified fitment for the Multiquip QP-401 quick-prime trash pump series.
- Leak Prevention at the Source — A correctly seated O Ring maintains hydraulic integrity within the pump housing; a worn or extruded ring allows fluid bypass, loss of prime, and accelerated internal wear.
- Fuel and Fluid Compatibility — Formulated to resist degradation from water, debris-laden fluid, and the operating temperatures typical of trash pump applications.
An O Ring is a circular elastomeric seal that sits in a machined groove between two mating surfaces, compressing under assembly to block the passage of fluid or air. In a trash pump like the QP-401, O Rings are used at key junction points in the pump housing and volute assembly to maintain prime and prevent leakage under suction and discharge pressure. When an O Ring hardens, cracks, or takes a permanent set from heat and use, the seal breaks down — leading to loss of prime, reduced flow, and potential water ingress into areas of the pump that accelerate wear on surrounding components.
Have questions about fitment or need help confirming this is the right part for your QP-401? Contact the DHS Equipment parts team for assistance.
Part Details
| Part Number | 4000510 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | O Ring |
Compatibility & Fitment
| Name | Model |
|---|---|
| QP-401 | QP-401 |
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.
