Multiquip 34489 Flap Valve

The Multiquip 34489 Flap Valve is a genuine OEM component designed for MQ600-series trash pumps, including the MQ600TD80-TLRB, MQ600TD80-TLRP, MQ600H, MQ600HTB, and MQ600HTP. As a direct OEM replacement, this flap valve is manufactured to the same specifications as the original part, ensuring proper fit and function without modification. Sourced directly through authorized Multiquip supply channels, the 34489 is the correct part to restore your pump to full operational condition.

Key Features

• Genuine OEM Construction — Manufactured to Multiquip's original material and dimensional specifications, ensuring the valve seats and seals correctly under pumping pressure.
• Direct Drop-In Replacement — Engineered to install in the same position as the original flap valve, with no rework or adapting required to the pump housing.
• Broad MQ600-Series Compatibility — Confirmed fitment across MQ600TD80-TLRB, MQ600TD80-TLRP, MQ600H, MQ600HTB, and MQ600HTP trash pump models.
• Maintains Flow Direction Integrity — A worn or compromised flap valve allows backflow that starves the pump of prime, leading to loss of discharge pressure and cavitation damage. Replacing it restores proper one-way flow.
• Critical to Priming Performance — The flap valve is a key component in the self-priming cycle. A correctly functioning valve allows these pumps to re-prime quickly on the jobsite without manual intervention.

The flap valve is a one-way check valve seated within the pump body that controls the direction of fluid flow during the priming and pumping cycle. It opens under forward flow to allow water and slurry to pass toward the discharge port, then closes to prevent backflow when pumping pressure drops. When the flap valve wears, tears, or loses its seating integrity, the pump loses its ability to self-prime, resulting in reduced suction lift and inconsistent discharge. Replacing a failed flap valve with the correct OEM part — like the Multiquip 34489 — restores the pump's ability to handle the demanding conditions typical of trash pump applications.

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.