The Honda 78139-YF4-702 Hose Band is a genuine OEM replacement designed for WN20 and WN30 water pumps. As a direct Honda OEM component, this hose band is manufactured to the exact specifications required for proper hose retention on these pumps. Confirm your pump's serial number against the fitment table before ordering, as Honda updates parts at serial breaks and the correct band for your unit matters. This part fits WN20 and WN30 water pumps — verify your model before purchasing.
Key Features
- Genuine Honda OEM Part — sourced directly from Honda, this hose band meets the exact specifications called out in the WN20 and WN30 parts catalogue, ensuring correct sizing and clamping retention for the hose connections on your pump.
- Secure Hose Retention — a properly functioning hose band keeps discharge and suction hoses firmly seated, preventing slippage or leaks under the pressures generated during pump operation.
- Direct Replacement — engineered to replace the original band without alteration, restoring hose connections to the condition Honda designed for these water pumps.
- Check Your Serial Number — Honda revises parts at production serial breaks; confirm part number 78139-YF4-702 against your pump's serial number in the fitment table to ensure this is the right band for your unit.
A hose band is the clamping fastener that secures a hose to its fitting or port on the water pump, holding the connection tight against the pressure and vibration generated during operation. On the WN20 and WN30 water pumps, a correctly fitted hose band prevents leaks at suction and discharge connections that would otherwise reduce pumping efficiency or allow water to escape at the joint. When a hose band loosens, corrodes, or loses clamping force, hoses can work free under pressure, interrupting flow and potentially damaging connected equipment.
Part Details
| Part Number | 78139-YF4-702 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Hose Band |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WN20, WN30 | 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.
