The Honda 78112-YB0-004 End Plate Gasket is a genuine OEM replacement designed for WA15 and WB15 water pumps. Sourced directly from Honda, this gasket delivers the exact fit and sealing performance the pump was engineered around. It is the correct service part for restoring a watertight seal at the end plate on these Honda water pumps.
Key Features
- OEM Sealing Integrity — manufactured to Honda's exact specifications, this gasket maintains the compression and sealing surface geometry the end plate joint requires to prevent water bypass or leakage
- Direct-Fit Replacement — designed specifically for the WA15 and WB15 water pumps, this part drops in without modification during end plate service or pump rebuild
- Verify Your Serial Number — Honda updates parts at production breaks, so confirm your pump's serial number against the fitment table before ordering to ensure part number 78112-YB0-004 is correct for your unit
- Leak Prevention — a failed or degraded end plate gasket allows water to escape the pump casing, reducing output pressure and flow; replacing it restores the pump to full operating performance
The end plate gasket forms a sealed joint between the end plate and the pump casing on Honda centrifugal water pumps. It prevents water from bypassing the pump cavity, which is essential for maintaining discharge pressure and flow rate. When this gasket deteriorates, cracks, or is damaged during service, the pump loses efficiency and may develop visible leaks at the end plate — replacing it is a standard step in any pump teardown or rebuild.
Part Details
| Part Number | 78112-YB0-004 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | End Plate Gasket |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WA15 | 1340458-9999999 |
| Water Pump | WB15 | All |
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.
