The Wacker Neuson Valve is a genuine OEM Valve designed for the APT4S, APT6S, APT8S, APT4T, APT6T, and APT8T pump series, including skid-mounted, surge brake, electric brake, and cold weather configurations. As a factory-sourced component, this valve is built to the same specification as the part originally installed on your machine, ensuring correct flow control and system integrity across all covered models. With compatibility spanning eighteen distinct machine configurations — from standard skid units to cold weather surge and electric brake trailer pumps — this is the definitive replacement valve for the APT pump lineup.
Key Features
- Genuine OEM Flow Specification — Sourced directly from Wacker Neuson, this valve meets the exact flow and pressure ratings required for proper pump operation — no guesswork on compatibility.
- Drop-In Installation — Engineered to the original port geometry and connection points, this valve seats and seals the same way the factory unit does, making service straightforward.
- Broad APT Series Coverage — Fits APT4S, APT6S, APT8S, APT4T, APT6T, and APT8T pumps across skid, surge brake, electric brake, and cold weather variants.
- Sustained Pump Output — A correctly functioning valve maintains consistent fluid control within the pump system; a worn or stuck valve can cause pressure loss, erratic output, or pump damage.
- Cold Weather Variant Compatible — Verified for use in cold weather-rated configurations, meaning the part is appropriate for the more demanding environmental specs those machines require.
A valve in a water pump system controls the direction and flow of fluid through the pump's internal passages, allowing the machine to build and maintain pressure during operation. When the valve is functioning correctly, fluid moves efficiently through the system and discharge pressure stays consistent. If the valve wears, cracks, or fails to seat properly, the pump can lose prime, deliver uneven output, or fail to move water at the rated volume — issues that become immediately apparent on site.
Part Details
| Part Number | 5200021759 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Valve |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT6S Pump w/Skid | APT6S | 5200018982 |
| APT6T Pump, Surge Brake | APT6T | 5200019646, 5200019647 |
| APT6T Pump, Surge Brake, Cold Weather | APT6T CW | 5200019794, 5200019795 |
| APT4S Pump w/Skid | APT4S | 5200018977 |
| APT8S Pump w/Skid | APT8S | 5200018987 |
| APT4T Pump, Surge Brake | APT4T | 5200019643, 5200019644 |
| APT8T Pump, Surge Brake | APT8T | 5200019648, 5200019649 |
| APT4T Pump, Surge Brake, Cold Weather | APT4T CW | 5200019792, 5200019793 |
| APT8T Pump, Surge Brake, Cold Weather | APT8T CW | 5200019796, 5200019797 |
| APT4S Pump w/Skid, Cold Weather | APT4S CW | 5200019798 |
| APT6S Pump w/Skid, Cold Weather | APT6S CW | 5200019799 |
| APT8S Pump w/Skid, Cold Weather | APT8S CW | 5200019800 |
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.
