The Wacker Neuson is a genuine OEM Fitting 1/4 NPT x 3/8 Barb designed for the GP and GPS series portable generators, including the GP2500A, GP3800A, GP5600A, GP6600A, GPS5600A, and GPS6600A. Sourced directly from Wacker Neuson, this fitting matches the original component specification used on the production line, so it installs without modification to existing fuel or fluid lines. It is compatible across a wide range of GP and GPS generator configurations — standard, wheel kit, electric start, GFI, CARB, CSA, and EPA variants — making part a versatile stocking item for service shops and fleet operators alike. Verify your machine's model and configuration against the fitment list before ordering to confirm compatibility.
Key Features
- Genuine OEM Threaded-to-Barb Connection: — Machined to the original 1/4 NPT male thread and 3/8 barb dimensions, ensuring a leak-free seal in the fuel or fluid circuit without retapping or adapting existing ports.
- Drop-In Installation: — Matches the thread pitch, barb diameter, and overall length of the original fitting, so it threads directly into the existing port and accepts the original hose diameter.
- Broad GP and GPS Generator Coverage: — Fits GP2500A, GP3800A, GP4000, GP5600A, GP6600A, GPS5600A, and GPS6600A generators across standard, wheel kit, electric start, GFI, CARB, CSA, and EPA configurations.
- Fuel System Integrity: — A correctly seated fitting maintains the sealed fuel pathway the generator depends on for steady output; a cracked or stripped fitting allows fuel or fluid leaks that disrupt engine operation and create a fire hazard.
- Fuel System Safety: — Threaded fittings in the fuel circuit are a primary leak point; using an OEM-spec replacement ensures the correct torque engagement and material compatibility to maintain a safe, sealed connection.
A 1/4 NPT x 3/8 Barb fitting serves as the transition point between a threaded port — such as a fuel valve, filter housing, or manifold — and a flexible hose in the generator's fuel delivery circuit. The NPT (National Pipe Taper) thread creates a pressure-resistant mechanical seal when torqued into the mating port, while the barbed end grips the inner wall of the hose to hold it securely without a separate clamp connection at that interface. When this fitting cracks, corrodes, or strips its threads, fuel can leak at the connection point, causing engine starvation, poor output, or a fire risk — making prompt replacement with the correct OEM part essential.
Part Details
| Part Number | 5000165523 |
|---|---|
| Old Part Number | 0165523 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Fitting 1/4 NPT x 3/8 Barb |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Premium Portable Generator | GP5600A | 5000620094, 5000620095, 5000620381, 5000620382, 5000620326, 5000620327, 5000620984, 5000620979, 5000620980, 5000620042, 5000620043, 5000620091, 5000620092, 5000620011, 5000620012 |
| GPS5600A,CAN GFI | GPS5600A | 5000620096, 5000620383, 5000620328, 5000620981, 5000620982, 5000620044, 5000620093, 5000620013 |
| GP6600A GENERATOR,CAN GFI | GP6600A | 5000620100, 5000620101, 5000620384, 5000620329, 5000620330, 5000620045, 5000620046, 5000620097, 5000620098, 5000620014, 5000620015 |
| GPS6600A GENERATOR,CAN GFI | GPS6600A | 5000620102, 5000620386, 5000620331, 5000620047, 5000620099, 5000620016 |
| Portable Generator | GP3800A | 5000620104, 5000620379, 5000620485, 5000620342, 5000620484, 5000620041, 5000620103, 5000620010 |
| Premium Portable Generator | GP6600 | 5000620385, 5000620989, 5000620990, 5000620985, 5000620986 |
| Premium Portable Generator | GP4000 | 5000620090, 5000620380, 5000620977, 5000620978 |
| GP2500A | GP2500A | 5000620128, 5000620009 |
| GPS6600A Generator, EPA | GPS6600 | 5000620987, 5000620988 |
| GP3800A Generator, EPA w/Wheel Kit | GP3800 | 5000620976, 5000620974, 5000620975, 5100031174 |
| GP5600A Generator, EPA w/Wheel Kit | GP5600 | 5000620983 |
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