The Wacker Neuson 5200021699 is a genuine OEM O-Ring designed for the APT6T and APT6S submersible pump series. Sourced directly through Wacker Neuson's authorized parts program, this O-Ring delivers the material grade and dimensional accuracy needed to maintain a reliable fluid seal in demanding pump applications. It is confirmed compatible across multiple APT6T and APT6S configurations, including Electric Brake, Surge Brake, Cold Weather, and Skid-mounted variants. Keeping an exact-fit O-Ring like the 5200021699 on hand means seal replacements are completed quickly and correctly the first time.
Key Features
- OEM Seal Material and Sizing — Manufactured to Wacker Neuson's exact compound and dimensional specification, ensuring correct compression and sealing against pump housing surfaces.
- Drop-In Replacement — Profiles match the OEM groove geometry on APT6T and APT6S pump assemblies, allowing a straightforward seat without trimming or reshaping.
- Broad APT Series Fitment — Covers APT6T Electric Brake, APT6T Surge Brake, APT6S with Skid, and all corresponding Cold Weather variants within the APT6 pump family.
- Leak-Free Pump Operation — A correctly seated O-Ring maintains internal pressure integrity; a worn or cracked O-Ring leads to fluid bypass, loss of pump efficiency, and potential water ingress into critical components.
- Fluid System Integrity — Proper sealing at O-Ring interfaces is essential for safe pump operation; a failed seal can allow fluid contamination or uncontrolled leakage under operating pressure.
An O-Ring is a precision-molded loop of elastomeric material that creates a static or dynamic fluid seal between two mating surfaces inside a pump assembly. In submersible pump applications like the APT6T and APT6S, O-Rings prevent water and pumped media from bypassing critical joints, protecting internal mechanisms and maintaining pumping efficiency. When an O-Ring degrades — through compression set, cracking, or chemical wear — the seal fails, resulting in leakage, pressure loss, and accelerated wear to surrounding components.
Part Details
| Part Number | 5200021699 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT6T Pump, Electric Brake | APT6T | 5200019647, 5200019646 |
| APT6T Pump, Electric Brake, Cold Weather | APT6T CW | 5200019795, 5200019794 |
| APT6S Pump w/Skid | APT6S | 5200018982 |
| APT6S Pump w/Skid, Cold Weather | APT6S CW | 5200019799 |
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.
