Multiquip 81020021000 DCA220 Expansion Tank

The Multiquip 81020021000 DCA220 Expansion Tank is a genuine OEM component designed for the DCA-220 ultra-silent diesel generator series. Sourced directly from Multiquip, this part meets the exact specifications required by the DCA-220 cooling system, ensuring the engine operates within safe thermal limits. DHS Equipment supplies this as a direct OEM replacement, so you can be confident in fitment and compatibility with your DCA-220 unit.

Key Features

• OEM Cooling System Integrity — Engineered to the precise volume and pressure tolerances of the DCA-220 coolant circuit, maintaining proper fluid capacity and system pressure.
• Direct OEM Replacement — Installs into the existing mounting position on the DCA-220 without modification, using the original connection points and mounting hardware.
• Confirmed DCA-220 Fitment — Verified for compatibility with the Multiquip DCA-220 ultra-silent generator series using part number 81020021000.
• Thermal Stability Under Load — A correctly functioning expansion tank prevents coolant overflow and air ingestion during heat cycles, allowing the generator to sustain continuous output without thermal faults.
• Prevents Costly Coolant Loss — A cracked or failed tank causes coolant to escape under pressure, risking overheating and engine damage; replacing it promptly keeps the cooling circuit sealed and effective.

The expansion tank is a pressurized reservoir within the engine cooling circuit that accommodates the volume change of coolant as it heats up and cools down during operation. As the engine reaches operating temperature, coolant expands into the tank; as it cools, fluid is drawn back into the system to maintain a full circuit. When the expansion tank cracks, leaks, or loses its pressure cap seal, the cooling system can no longer regulate fluid volume correctly, leading to overheating, air locks, and potential engine damage if left unaddressed.

For questions about this part or to confirm compatibility with your specific DCA-220 unit, contact the DHS Equipment team directly.

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.