The Wacker Neuson Cover Check Valve Seal 4in is a genuine OEM component designed for the APT4S and APT4T pump series, including standard, surge brake, electric brake, and cold weather configurations. Sourced directly from Wacker Neuson, this part carries the same material and dimensional specifications as the original, ensuring a correct fit against the check valve cover on 4-inch pump assemblies. Confirmed fitment spans the full APT4S and APT4T lineup, covering both skid-mounted and cold weather variants.
Key Features
- OEM-Grade Seal Integrity — Manufactured to Wacker Neuson's sealing material specifications, delivering the compression performance required to prevent bypass and fluid ingress at the check valve cover.
- Direct Drop-In Replacement — Engineered to seat against the 4-inch check valve cover exactly as the original, with no trimming or fitment adjustments needed during installation.
- Broad APT Series Compatibility — Fits APT4S and APT4T pump models across surge brake, electric brake, and cold weather variants, covering the full range of 4-inch Wacker Neuson diaphragm pump configurations.
- Maintains Pump Flow Control — A correctly sealed check valve cover keeps the valve operating as intended, sustaining one-directional flow and preventing pressure loss during pumping cycles.
- Fluid System Safety — A failed or degraded check valve seal can allow uncontrolled backflow or leakage at the valve housing; replacing it with a genuine OEM seal restores proper containment and prevents unplanned discharge.
The cover check valve seal forms the sealing interface between the check valve cover and the pump body on 4-inch diaphragm pump assemblies. Its job is to maintain a leak-free boundary at that junction so the check valve can regulate flow direction without bypassing fluid around the seat. When this seal deteriorates — through compression set, chemical degradation, or physical damage — the result is fluid weeping at the valve cover, loss of pumping efficiency, or backflow that compromises the pump's ability to move water effectively. Replacing a worn seal promptly restores proper valve function and protects the surrounding pump components from moisture and contamination damage.
Part Details
| Part Number | 5100041316 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Cover Check Valve Seal 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.
