The Wacker Neuson is a genuine OEM Fitting 1/8 BSPT x 1/8 FNPT designed for the G25, G20, and G12 series portable generators. As a direct factory replacement, this fitting ensures a correctly threaded, leak-free connection between British Standard Pipe Taper (BSPT) and Female National Pipe Taper (FNPT) ports within the generator's fluid or fuel system. This part covers an extensive range of G25 configurations — including skid-mounted, cold weather, extended run tank, custom, and Tier 4i and Tier 4F variants — as well as select G20 and G12 models. Confirm your machine number against the fitment list before ordering to ensure compatibility with your specific configuration.
Key Features
- Genuine OEM Thread Integrity — Manufactured to exact BSPT-to-FNPT thread specifications, ensuring a pressure-rated, leak-free seal without the risk of cross-threading or improper engagement.
- Direct-Swap Replacement — Threads into existing BSPT ports and accepts standard 1/8 FNPT fittings or lines on the opposite end, matching the original installation point for point.
- Broad G-Series Compatibility — Fits a wide range of G25 generator variants including skid-mounted, cold weather, extended run tank, custom, T4i, T4F, and 600V switchable models, plus G20 and G12 configurations.
- Protects System Integrity — A correctly seated adapter fitting maintains proper line pressure and prevents fluid or fuel seepage that can lead to generator faults, contamination, or fire risk in fuel-system applications.
- Fuel and Fluid System Safety — In fuel-line applications, a worn or damaged adapter fitting can result in dangerous leaks; using a genuine OEM part with the correct thread form and material grade is essential for safe generator operation.
A BSPT-to-FNPT adapter fitting serves as the threaded transition point between two different pipe thread standards used in the generator's fuel, oil, or fluid delivery system. The BSPT (British Standard Pipe Taper) male end seals against a tapered port in the machine's body or component housing, while the FNPT (Female National Pipe Taper) end accepts a standard US-thread male fitting or line. When this fitting cracks, corrodes, or strips, it breaks the sealed connection in the system — causing leaks, pressure loss, or contamination that can affect generator performance or create a safety hazard. Replacing it promptly with the correct OEM part restores the system to its original sealed condition.
Part Details
| Part Number | 5000154301 |
|---|---|
| Old Part Number | 0154301 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Fitting 1/8 BSPT x 1/8 FNPT |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Mobile Generator, Custom | G25 | 5000620346, 5000620344, 5000620345, 5000620642, 5000009466, 5000620004, 5000620640, 5000620709, 5000620641, 5000009368, 5200005557, 5200003991, 5000620931, 5200001316, 5200014461, 5000009258, 5200014460, 5200014462, 5000621005, 5000008228, 5000620706, 5100022834, 5000009462, 5000009476, 5100042507, 5100042510, 5100042512, 5100042509, 5100025836, 5100042508 |
| Mobile Generator, Skid Mounted | G12 | 5000008227 |
| Mobile Generator | G20 | 5200016628, 5200022625 |
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.
Wacker Neuson