The Honda 78103-YG4-610 Inlet (NPTF) is a genuine OEM replacement designed for the WB30 water pump. As a direct Honda OEM part, it is manufactured to the same specification as the original, ensuring a proper connection at the pump's intake port. This inlet is built for the WB30 and buyers should confirm their unit's serial number against the fitment table to ensure part number 78103-YG4-610 is the correct match for their pump.
Key Features
- Genuine OEM Intake Fitment — sourced directly from Honda, this inlet matches the original thread form and port geometry for a leak-free connection at the WB30's intake.
- NPTF Thread Form — the National Pipe Taper Fuel (NPTF) thread profile is designed to create a pressure-tight seal on assembly, without relying solely on a separate sealing compound.
- WB30 Water Pump Fitment — designed specifically for the WB30 water pump; confirm your unit's serial number against the fitment table before ordering.
The inlet is the threaded fitting at the suction side of the water pump through which water is drawn into the pump body. On a centrifugal pump like the WB30, a properly sealed inlet allows the impeller to generate the full vacuum needed to prime and maintain water flow. A cracked, stripped, or leaking inlet fitting allows air to enter the suction line, which disrupts priming, reduces flow rate, and can cause the pump to lose prime entirely during operation.
Part Details
| Part Number | 78103-YG4-610 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Inlet (NPTF) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WB30 | 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.
