The Wacker Neuson Flange is a genuine OEM component designed for the E1250S and E1250P hydronic heaters as well as the HSH380S and HSH380B hydronic surface heaters. As a factory-sourced part, the is manufactured to the exact tolerances and material specifications required for proper sealing and secure connection within the hydronic circuit. This flange fits across multiple configurations including LP/NG, Diesel, Standard, and Premium variants, making it a versatile service part for contractors running mixed fleets of Wacker Neuson hydronic heating equipment. Order with confidence knowing this is a direct OEM replacement backed by Wacker Neuson's parts program.
Key Features
- Genuine OEM Sealing Integrity — Manufactured to the exact material grade and dimensional spec required to maintain a leak-free connection in hydronic fluid circuits — critical for safe, efficient heat transfer.
- Drop-In Compatibility — Matches the original bolt pattern and face dimensions for direct installation with no rework to surrounding fittings or piping.
- Broad Model Coverage — Fits the E1250S (Standard LP/NG), E1250P (Premium Diesel and LP/NG), HSH380S (Natural Gas/Propane and Diesel with Generator), and HSH380B (Diesel without Generator).
- Maintains Hydronic Circuit Performance — A worn or cracked flange allows fluid leaks that reduce system pressure and heating output; replacing it with part number 5100015569 restores proper flow and thermal efficiency.
- Fuel-System Safety Relevance — Flanges in hydronic heating systems carry pressurized hot fluid; using the correct OEM-spec part ensures the joint meets pressure-retention requirements and reduces risk of fluid escape near heat sources.
A flange is a structural connection fitting that joins two sections of pipe, hose, or component housing within a fluid circuit, using a bolted face-to-face interface to create a secure, pressure-rated seal. In a hydronic surface heater like the E1250 or HSH380 series, flanges are used at key junctions in the heating fluid loop — connecting the burner assembly, heat exchanger, or distribution manifold. When a flange becomes cracked, warped, or corroded, the joint can weep or fail under operating pressure, causing fluid loss, reduced heating capacity, and potential safety hazards. Replacing a damaged flange promptly with the correct OEM part keeps the hydronic circuit closed, pressurized, and operating as intended.
Part Details
| Part Number | 5100015569 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Flange |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| E1250S | E1250S | 5200012355, 5200012354 |
| E 1250P Hydronic Heater, Premium, Diesel | E1250P | 5200012357, 5200012356 |
| HSH 380S-Natural Gas/Propane, w/Generator | HSH380S | 5200012370, 5200012371 |
| HSH380B-Diesel, without generator | HSH380B | 5200012359 |
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.
