The Honda 19106-PA0-020 Reserve Tank Joint is a genuine OEM component designed for a wide range of Honda engines, generators, lawn tractors, and multi-purpose and compact tractors, including the EL5000, ES6500, EX5500, GX360, GX640, H4514, H4518, H5518, H6522, HT3813, and HT4213. As a direct Honda OEM part, it is manufactured to the exact specifications of the original, ensuring a proper connection between the reserve tank and the cooling system it serves. Because this joint spans multiple Honda product lines, always confirm your machine's serial number against the fitment table before ordering.
Key Features
- Genuine Honda OEM Construction — manufactured to Honda's original specifications, so the joint seats and seals correctly without improvisation or adaptation
- Broad Cross-Platform Fitment — covers GX360 and GX640 horizontal shaft engines, EL5000, ES6500, and EX5500 generators, H4514, H4518, HT3813, and HT4213 lawn tractors, H5518 multi-purpose tractor, and H6522 compact tractor
- Serial Number Verification Recommended — Honda supersedes parts across production runs, so check your unit's serial number against the fitment table to confirm part number 19106-PA0-020 is correct for your specific machine
- Leak-Free Reserve Tank Connection — a failed or cracked joint allows coolant to escape the reserve tank circuit, leading to overheating and potential engine or equipment damage; this replacement restores the integrity of that connection
The reserve tank joint is the fitting that connects the overflow or reserve coolant tank to the main cooling circuit of the engine or machine. It allows the cooling system to breathe — as the engine warms, coolant expands into the reserve tank through this joint, and as it cools, that coolant is drawn back in. When the joint cracks, hardens, or loses its seal, the closed-loop relationship between the reserve tank and the cooling system is broken, coolant is lost rather than recovered, and the machine becomes vulnerable to overheating. Replacing a worn joint with a genuine OEM part restores that controlled exchange and protects the cooling system's long-term function.
Part Details
| Part Number | 19106-PA0-020 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Reserve Tank Joint |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Compact Tractor | H6522 | All |
| Generator | EL5000, ES6500, EX5500 | All |
| Horizontal Shaft Engine | GX360, GX640 | All |
| Lawn Tractor | H4514, H4518, HT3813, HT4213 | All |
| Multi-Purpose Tractor | H5518 | 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.
