The Honda 78313-YG0-003 Hose Coupling Gasket is a genuine OEM Hose Coupling Gasket designed for WT20 and WT30 water pumps. As a direct Honda OEM component, this gasket is manufactured to the same specifications as the part originally fitted at the factory, ensuring a proper seal at the hose coupling interface. This part is listed for both the WT20 and WT30 water pumps — confirm part number 78313-YG0-003 against your unit's serial number and the fitment table to make sure this is the correct gasket for your pump before ordering.
Key Features
- Genuine OEM Sealing Integrity — sourced directly from Honda, this gasket is built to deliver a leak-free seal at the hose coupling, maintaining the pump's rated flow and pressure output.
- Direct OEM Replacement — this part installs in place of the original with no modification, restoring the coupling connection to as-built condition.
- Fits WT20 and WT30 Water Pumps — listed for Honda WT20 and WT30 centrifugal water pumps; check your serial number against the fitment table to confirm the correct application.
- Critical for Pump Performance — a worn or damaged coupling gasket allows water to weep at the hose connection, reducing pump efficiency and potentially drawing air into the system; replacing it promptly keeps the pump operating at full output.
The Hose Coupling Gasket forms a watertight seal where the suction or discharge hose connects to the pump body. In a centrifugal water pump like the WT20 and WT30, any air ingress or water loss at this joint reduces the pump's ability to maintain prime and deliver consistent flow. When this gasket deteriorates — through compression set, cracking, or wear — the coupling connection leaks, causing a drop in output and making it difficult for the pump to hold prime under load. Replacing this gasket with a genuine Honda OEM part restores the integrity of that connection and brings the pump back to full working condition.
Part Details
| Part Number | 78313-YG0-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Hose Coupling Gasket |
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.
