Multiquip 21218 Air Vent

The Multiquip 21218 Air Vent is a genuine OEM component designed for Whiteman and International walk-behind and ride-on power trowels, including the CA4HM, J3036H55, B46, JS60C, JTNSW20, and JTNS20 series. As a direct OEM replacement, part 21218 is built to the same specifications as the original, ensuring a proper, trouble-free installation. DHS Equipment supplies this part direct, so you can verify the part number and order with confidence for your specific trowel model.

Key Features

• Genuine OEM Venting Specification — Manufactured to the same flow and material standards as the original, ensuring correct pressure equalization for your trowel's gearbox or fuel system.
• Drop-In Installation — Matches the original mounting thread and port size for a straightforward swap with no rework required.
• Broad Trowel Compatibility — Fits a wide range of Whiteman and International power trowel models, including CA4HM, CA4HC/CA5BC, B46, BS90C, BH11C, BH90C, JH90C, JH55C, JS60C, JTNSW20, JTNSW24HTCSL, and the J36-M30 series.
• Prevents Pressure Buildup — A properly functioning air vent allows sealed housings to breathe correctly, preventing seal damage and lubricant leaks caused by pressure imbalance.
• Verified Multiquip Part Number — Ordering by OEM part number 21218 eliminates the guesswork of cross-referencing aftermarket substitutes.

An air vent allows a sealed enclosure — such as a gearbox, fuel tank, or crankcase — to equalize internal pressure with the surrounding atmosphere as the machine heats up and cools down during operation. Without a functioning vent, pressure can build inside the housing, forcing lubricant or fluid past seals and causing leaks or premature seal failure. On power trowels, maintaining this pressure balance is essential to protecting the drivetrain and keeping the machine running cleanly through long finishing cycles.

For questions about fitment or to confirm compatibility with your specific trowel model, contact the DHS Equipment team before ordering.

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.