The Honda 78139-YB9-003 Hose Band is a genuine OEM Hose Band designed for Honda WT20 and WT30 water pumps. As a direct Honda OEM replacement, this part matches the original specification for a secure, reliable connection with no guesswork on fit. Honda supersedes parts at serial breaks, so verify your pump's serial number against the fitment table before ordering to confirm part number 78139-YB9-003 is correct for your unit. A failed or degraded hose band can allow hoses to slip or weep under pressure, undermining the pump's output and efficiency.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this Hose Band meets the same specification as the part that left the factory with your pump, ensuring a proper clamp load on the hose.
- Secure Hose Retention — a correctly functioning hose band keeps pump hoses firmly seated at their connections, preventing pressure loss and unwanted leakage during operation.
- WT20 and WT30 Fitment — confirmed for Honda WT20 and WT30 water pumps; check your serial number against the fitment table to verify the correct application for your specific unit.
A hose band is a clamping fastener that secures a hose to its fitting or nipple on the water pump, holding it in place against the pressure and vibration generated during operation. On pumps like the WT20 and WT30, these bands keep intake and discharge hoses firmly attached so the pump can build and sustain full flow without leaking at the connection points. When a hose band weakens, corrodes, or loses clamping force, the hose can loosen under pressure, reducing pump output or allowing water to escape at the fitting — replacing it promptly restores a proper seal and protects the hose connection from further wear.
Part Details
| Part Number | 78139-YB9-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Hose Band |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WT20, WT30 | 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.
