The Wacker Neuson 5200021681 is a genuine OEM O-Ring designed for the APT8T and APT8S submersible pump series, including electric brake, surge brake, and cold weather variants. As a factory-sourced seal component, this O-Ring is manufactured to the exact material grade and dimensional tolerances specified for these pumps, ensuring a proper compression fit at the sealing interface. It is compatible across the full APT8T and APT8S lineup, covering standard and cold weather configurations with skid-mounted options included.
Key Features
- Exact Material and Dimensional Spec — Manufactured to the precise cross-section diameter and durometer rating required for the APT8T and APT8S pump sealing surfaces, ensuring correct compression and sealing performance.
- Genuine OEM Component — Sourced directly from Wacker Neuson, this O-Ring matches the original part installed at the factory — no guesswork on sizing or material compatibility.
- Broad APT8T and APT8S Fitment — Covers electric brake, surge brake, cold weather, and skid-mounted variants across the APT8T and APT8S submersible pump families.
- Leak Prevention at the Source — A correctly seated O-Ring maintains a fluid-tight seal within the pump assembly; a worn or degraded ring can allow fluid ingress or loss, leading to pump failure or contamination.
- Direct Drop-In Replacement — Installs into the existing groove without modification, restoring the sealing interface to its original operating condition.
An O-Ring is a molded loop seal used to close off the gap between two mating components, preventing fluid or air from passing through the joint. In submersible pump applications like the APT8T and APT8S, O-Rings are critical to maintaining the integrity of sealed chambers and preventing water ingress into areas that must remain dry. When an O-Ring flattens, cracks, or loses elasticity over time, the seal fails — resulting in leaks, pressure loss, or internal contamination that can damage pump components and interrupt operation.
Part Details
| Part Number | 5200021681 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT8T Pump, Electric Brake | APT8T | 5200019649, 5200019648 |
| APT8T Pump, Electric Brake, Cold Weather | APT8T CW | 5200019797, 5200019796 |
| APT8S Pump w/Skid, Cold Weather | APT8S CW | 5200019800 |
| APT8S Pump w/Skid | APT8S | 5200018987 |
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.
