The Wacker Neuson 5200021764 is a genuine OEM Check Valve designed for the APT-series submersible pump lineup, covering APT4S, APT4T, APT6S, APT6T, APT8S, and APT8T models — including standard and Cold Weather configurations with both Surge Brake and Electric Brake variants. As a direct OEM replacement, part 5200021764 is manufactured to the same specifications as the original component installed at the factory. Whether you're servicing a skid-mounted unit or a trailer-mounted pump, this check valve is the correct, verified replacement to restore proper pump operation across the full APT family.
Key Features
- Genuine OEM Construction — Manufactured to the original material and dimensional tolerances for this valve seat and sealing application, ensuring consistent flow control performance every cycle.
- Broad APT-Series Compatibility — Fits APT4S, APT4T, APT6S, APT6T, APT8S, and APT8T pump models, including standard and Cold Weather variants with Surge Brake or Electric Brake configurations.
- Direct Drop-In Replacement — Engineered to install in the same position and orientation as the original valve, with matching port dimensions and connection geometry.
- Maintains Pump Flow Integrity — A correctly functioning check valve prevents backflow through the pump, protecting internal components and maintaining priming between cycles. A worn or failed valve leads to loss of prime and reduced pumping efficiency.
- Verified Part Number — Part number 5200021764 is the OEM-sourced reference for this check valve across the entire APT submersible pump series, eliminating guesswork when ordering.
A check valve is a one-way flow control device that allows fluid to move in a single direction through the pump system while preventing it from flowing back when the pump stops or loses pressure. In submersible pump applications like the Wacker Neuson APT series, the check valve is critical to maintaining prime and protecting the pump from reverse-flow damage during shutdown cycles. When this valve wears, cracks, or fails to seat properly, the pump can lose prime repeatedly, run dry, or experience reduced output — all of which shorten service life and interrupt site drainage operations.
Part Details
| Part Number | 5200021764 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Check Valve |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT6T Pump, Electric Brake | APT6T | 5200019647, 5200019646 |
| APT6S Pump w/Skid | APT6S | 5200018982 |
| APT6T Pump, Electric Brake, Cold Weather | APT6T CW | 5200019795, 5200019794 |
| APT4S Pump w/Skid, Cold Weather | APT4S CW | 5200019798 |
| APT4T Pump, Surge Brake, Cold Weather | APT4T CW | 5200019792, 5200019793 |
| APT4S Pump w/Skid | APT4S | 5200018977 |
| APT6S Pump w/Skid, Cold Weather | APT6S CW | 5200019799 |
| APT4T Pump, Surge Brake | APT4T | 5200019643, 5200019644 |
| APT8T Pump, Surge Brake, Cold Weather | APT8T CW | 5200019796, 5200019797 |
| APT8S Pump w/Skid | APT8S | 5200018987 |
| APT8S Pump w/Skid, Cold Weather | APT8S CW | 5200019800 |
| APT8T Pump, Electric Brake | APT8T | 5200019649, 5200019648 |
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.
