The Wacker Neuson Check Valve Disc Seal 8in is a genuine OEM component designed for the APT8S and APT8T pump series, including standard, surge brake, electric brake, and cold weather configurations. As a factory-sourced part, delivers the same material grade and dimensional tolerancing as the seal originally installed at the time of manufacture. Verified fitment spans the full APT8 family — including APT8S Pump with Skid, APT8T Pump with Surge Brake, APT8T Pump with Electric Brake, and their cold weather variants — so you can order with confidence that this is the correct seal for your machine.
Key Features
- OEM-Grade Sealing Material — Manufactured to the same compound and compression rating as the original, ensuring a consistent fluid-tight seal at the check valve under working pump pressures.
- Direct Drop-In Replacement — Sized for the 8-inch check valve seat; seats and aligns to the original mounting geometry without rework or adaptation.
- Broad APT8 Series Coverage — Fits APT8S and APT8T pumps across standard, surge brake, electric brake, and cold weather configurations, covering six distinct model variants in a single part number.
- Maintains One-Way Flow Integrity — A correctly seated disc seal keeps the check valve closing fully between pump strokes; a worn or degraded seal allows backflow that robs prime and reduces output volume.
- Fluid Containment Compliance — Proper check valve sealing prevents bypass leakage at the valve body, supporting safe, drip-free pump operation in demanding site conditions.
The check valve disc seal is the flexible seating element inside the pump's check valve assembly that allows fluid to flow in one direction while blocking reverse flow between strokes. It works in tandem with the valve body to maintain prime and sustain consistent output pressure — without it functioning correctly, the pump loses its ability to draw and push fluid efficiently. When this seal deteriorates through abrasion, chemical exposure, or fatigue, the check valve can no longer fully close, leading to backflow, loss of prime, and a noticeable drop in pumping performance.
Part Details
| Part Number | 5100041350 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Check Valve Disc Seal 8in |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT8S Pump w/Skid | APT8S | 5200018987 |
| APT8T Pump, Surge Brake | APT8T | 5200019648, 5200019649 |
| APT8T Pump, Surge Brake, Cold Weather | APT8T CW | 5200019796, 5200019797 |
| 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.
