Diaphragm | 3" | PDI3, PDI3A

The Wacker Neuson Diaphragm is a genuine OEM component designed for the PDT3A, PDT3, PDI3A, and PDI3A(I) submersible pumps. As a factory-sourced part, the is manufactured to the same specifications as the original, ensuring a direct, compatible installation with no guesswork on fit or function. This diaphragm is a critical wear component, and replacing it with a genuine Wacker Neuson part helps restore full pumping capacity and protect the pump from further wear. Whether you are servicing a PDT3A or any of the compatible PDI3A variants, this is the correct OEM replacement to keep your pump running as intended.

Key Features

• OEM-Grade Flexural Integrity — Manufactured from materials that meet Wacker Neuson's original flex-cycle and chemical-resistance specifications, ensuring the diaphragm maintains its seal under continuous pumping pressure.
• Direct-Fit Installation — Engineered to the exact bolt pattern, port dimensions, and thickness of the original, so it drops into place with the same hardware and fastener positions as the factory part.
• Broad PDT/PDI Series Compatibility — Confirmed fitment across the PDT3A, PDT3, PDI3A, and PDI3A(I) submersible pump models, covering multiple configurations within this pump family.
• Restores Full Flow Performance — A cracked, torn, or fatigued diaphragm causes immediate loss of prime, reduced flow rate, and pump cavitation; a fresh OEM diaphragm brings output back to rated capacity.
• Genuine Wacker Neuson OEM Part — Sourced directly from Wacker Neuson, part number 5000180238 carries full OEM traceability, so you can be confident in the part's authenticity and consistency.

The diaphragm in a submersible pump creates the reciprocating seal that drives fluid through the pump body — it flexes under pressure to move water (or water-laden slurry) from the intake port to the discharge outlet with each pump cycle. Because it operates under constant mechanical stress and exposure to abrasive or chemically active fluids, the diaphragm is a routine wear item that degrades over time. A worn or ruptured diaphragm allows fluid to bypass the pumping chamber, resulting in reduced output, loss of prime, or complete pump failure; replacing it promptly with a correctly specced part restores the pump to full working order.

Part Details

Compatibility & Fitment

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.