Multiquip 21033 Sight Glass 3/4 NPT Steel

The Multiquip 21033 Sight Glass 3/4 NPT Steel is a genuine OEM component designed for Whiteman and International walk-behind and ride-on power trowel models, including HDA-Series, STX6H, HTX6H, J36-M30 Series, CA4HC, CA5BC, BS90C, BH11C, and many additional trowel configurations. As a direct OEM replacement, the 21033 meets Multiquip's original build specifications, ensuring a correct thread engagement and seal at the 3/4 NPT connection point. Whether you are servicing a walk-behind unit like the JS60C or JH90C, or maintaining a ride-on trowel such as the HHN34TVD or HHXD5, this part matches the original fitment precisely. Sourced directly from Multiquip, it is the trusted choice for fleet managers and concrete finishing crews who need dependable, verified parts.

Key Features

• Steel Construction at 3/4 NPT Spec — Manufactured in steel to withstand the operating environment of concrete finishing equipment, maintaining thread integrity at the 3/4 NPT port without distortion or corrosion-related failure over time.
• Genuine OEM Part — Supplied directly by Multiquip as part number 21033, confirming it meets the same material and dimensional standards as the original part installed at the factory.
• Direct Threaded Replacement — The 3/4 NPT thread form installs directly into the existing tapped port with no rethreading, adapters, or additional fittings required.
• Broad Trowel Series Compatibility — Fits an extensive range of Whiteman and International power trowel models, including HDA-Series, STX6H, HTX6H, J36-M30 Series, CA4HC, CA5BC, BS90C, BH11C, BH90C, JS60C, JH90C, JH55C, B46, and additional walk-behind and ride-on configurations.
• Clear Fluid Level Monitoring — A functional sight glass allows operators to visually check fluid levels at a glance, supporting proper lubrication maintenance and helping prevent premature gearbox or engine wear.
• Fluid Containment Integrity — A cracked or missing sight glass allows contamination to enter and fluid to escape; replacing a damaged unit with the correct OEM part restores the sealed system and protects internal components.

A sight glass provides a visual inspection port in a fluid reservoir or gearbox housing, allowing operators to confirm that oil or lubricant is at the correct level without removing covers or drain plugs. On power trowels, maintaining proper gearbox lubrication is critical to protecting the gear train, blades, and drive components during extended concrete finishing operations. A damaged, cracked, or improperly fitted sight glass compromises this visibility and can allow contaminants into the system, leading to accelerated wear or undetected low fluid levels that result in mechanical failure.

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.