Multiquip 1378100020P002 Back Plate Powder Coated QP-205SM

The Multiquip 1378100020P002 is a genuine OEM Back Plate (Powder Coated) QP-205SM designed for the QP-205SM trash pump. This is a direct factory replacement sourced through Multiquip's authorized parts program, ensuring the component meets the original design intent for your machine. The powder coated finish delivers added resistance to corrosion and abrasion, helping the back plate hold up in the wet and debris-heavy conditions that trash pump applications demand. Confirmed fitment for the QP-205SM makes this a straightforward swap when your original plate is worn, cracked, or damaged.

Key Features

• Genuine OEM Construction — Manufactured to Multiquip's original design specifications, so the back plate mates correctly with the pump housing and impeller assembly without rework or shimming.
• Powder Coated Finish — The durable powder coat provides a hard, protective layer that resists rust, chemical exposure, and the abrasive slurry conditions common in trash pump operation.
• Direct QP-205SM Fitment — Purpose-built for the QP-205SM trash pump; part number 1378100020P002 cross-references directly to this model for confident ordering.
• Structural Integrity at the Pump Volute — A sound back plate maintains proper clamping force and sealing at the rear of the pump casing, keeping flow path geometry consistent and preventing pressure loss.
• Wear Replacement Value — Back plates on trash pumps take direct contact from abrasive solids in the flow stream; replacing a worn plate restores pump efficiency and protects the impeller from accelerated wear.

The back plate is a structural housing component that closes the rear of the pump volute, forming one side of the sealed cavity in which the impeller spins. It works alongside the front casing and wear plate to contain pressurized flow and direct water from the inlet to the discharge port. When the back plate becomes eroded, cracked, or warped — whether from solid debris impact or corrosion — it compromises the seal around the impeller, leading to pressure drop, reduced flow output, and potential damage to surrounding components. Replacing it promptly with a correctly fitted OEM part restores the pump's designed pumping efficiency and extends the service life of adjacent wear 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.

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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.