Multiquip 43342012400011 Impeller Washer Dia. 42 x 12 MM T4.5

The Multiquip 43342012400011 is a genuine OEM Impeller Washer Dia. 42 x 12 MM T4.5 designed for QP3TB, QP3TH, QP4TH, and QP3TZ series pumps. As a direct Multiquip OEM component, 43342012400011 meets the exact dimensional and material specifications required for proper impeller assembly and pump performance. This washer is confirmed for compatibility across both centrifugal and trash pump models in the QP series lineup. Ordering the correct OEM part ensures the impeller stack seats and functions exactly as engineered.

Key Features

• OEM-Matched Dimensional Spec: — At 42 x 12 MM with a 4.5 MM thickness, this washer meets the exact tolerancing required for correct impeller seating and load distribution in QP series pumps.
• Drop-In Impeller Assembly Fit: — Engineered to install directly into the impeller stack without machining or shimming, maintaining correct axial positioning against the pump shaft.
• Broad QP Series Compatibility: — Fits QP3TB centrifugal pump and QP3TH, QP4TH, and QP3TZ trash pumps, covering multiple models within the Multiquip Quick-Prime lineup.
• Preserves Pump Hydraulic Efficiency: — A correctly sized impeller washer maintains proper clearances within the volute, sustaining flow rate and discharge pressure. A worn or missing washer causes impeller wobble and a measurable drop in pump output.
• Genuine Multiquip OEM Part: — Sourced directly from Multiquip, this component is manufactured to the same specification as the part originally installed at the factory, ensuring consistent service life.

The impeller washer sits between the impeller and the pump shaft assembly, controlling axial positioning and distributing clamping load evenly across the impeller hub. It plays a direct role in keeping the impeller centered and stable within the pump casing, which is critical for maintaining consistent flow and preventing premature wear on both the impeller and the pump housing. When this washer is worn, damaged, or missing, the impeller can shift under load, causing vibration, reduced output pressure, and accelerated wear on surrounding pump components.

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.