The Wacker Neuson Plug is a genuine OEM component designed for the APT4S and APT4T pump series, including standard, cold weather, surge brake, and electric brake configurations. As a direct OEM replacement, this plug is sourced and manufactured to the same specifications as the original part installed at the factory, ensuring a correct, trouble-free fit. Compatible across six distinct APT4S and APT4T pump models, this part covers a wide range of jobsite configurations so you can confirm fitment with confidence. Keep a spare on hand and avoid unnecessary delays when routine maintenance or repair calls for it.
Key Features
- Genuine OEM Sealing Integrity — Manufactured to the original closure and sealing specification for this plug application, maintaining port integrity and preventing contamination ingress or fluid loss.
- Direct Drop-In Installation — Matches the original thread pitch, diameter, and seat profile of the APT4S and APT4T pump housings for straightforward installation without modification.
- Broad APT Series Fitment — Compatible with APT4S Pump with Skid, APT4T Pump with Surge Brake, APT4T Pump with Electric Brake, and all corresponding Cold Weather variants.
- Maintains System Pressure and Cleanliness — A correctly installed plug keeps pump ports sealed during storage, transport, or service intervals, preventing debris entry and protecting internal pump components.
- Verified OEM Part Number — Ordered by part number 5200019870, this plug is an authentic Wacker Neuson component — not a generic substitute — so you get the exact part the pump was built to accept.
A plug seals an unused or temporarily open port on the pump housing, preventing fluid leakage, air ingestion, and contamination from entering the system. On diaphragm and centrifugal pumps like the APT4S and APT4T series, maintaining sealed ports during servicing or off-season storage is critical to protecting internal valves and diaphragm assemblies from damage. A missing, damaged, or improperly seated plug can allow debris or moisture into precision-machined passages, leading to corrosion, clogged passages, or accelerated wear on pump internals.
Part Details
| Part Number | 5200019870 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Plug |
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.
