The Wacker Neuson Seal Disc, Check Valve 4in is a genuine OEM component designed for the APT4S and APT4T pump series, including cold weather variants. As a direct OEM part sourced from Wacker Neuson, it meets the exact material and dimensional requirements of the original — giving you a drop-in replacement with no guesswork. Compatible across the full APT4S and APT4T lineup, including skid-mounted, surge brake, electric brake, and cold weather configurations, this seal disc covers the core of the product family. Keep this part on hand as a planned service item to maintain consistent pump performance across demanding jobsite conditions.
Key Features
- OEM-Grade Seal Material — Manufactured to Wacker Neuson's original compound and compression specifications, ensuring the check valve seats and seals with the same integrity as the factory-installed part.
- Direct Drop-In Replacement — Engineered to the original disc profile and diameter for the 4-inch check valve assembly, so it installs into the valve body without rework or fitment adjustment.
- Broad APT4S and APT4T Compatibility — Fits the APT4S Pump with Skid, APT4T Pump with Surge Brake, APT4T Pump with Electric Brake, and all corresponding cold weather variants under a single part number.
- Maintains One-Way Flow Integrity — A correctly sealing disc prevents backflow through the check valve, keeping discharge pressure consistent and protecting pump internals from reverse flow damage.
- Genuine Wacker Neuson OEM Part — Supplied under part number 5100041315 directly from the manufacturer, so you get verified fitment accuracy and consistent quality on every order.
The check valve seal disc is the sealing element inside the pump's check valve assembly — it allows fluid to flow in one direction while blocking reverse flow when the pump is under load or at rest. Without a functioning seal disc, the check valve cannot hold pressure, leading to backflow, loss of prime, and reduced discharge performance. A worn or damaged disc is a common cause of pump inefficiency and should be inspected as part of routine pump servicing.
Part Details
| Part Number | 5100041315 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Seal Disc, Check Valve 4in |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT4S Pump w/Skid | APT4S | 5200018977 |
| APT4T Pump, Surge Brake | APT4T | 5200019643, 5200019644 |
| APT4T Pump, Surge Brake, Cold Weather | APT4T CW | 5200019792, 5200019793 |
| APT4S Pump w/Skid, Cold Weather | APT4S CW | 5200019798 |
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.
