The Speed Switch Knob to Suit X-3400 Air Scrubber is a genuine replacement part tailored specifically for the XPOWER X-3400 HEPA Air Scrubber. This durable knob allows users to control the unit’s variable speed precisely - rotating from OFF through LOW / MIN up to MAX - restoring the intuitive, user-friendly control of your scrubber. Designed to snap onto the potentiometer (speed control dial) of the X-3400, this knob ensures a solid grip, smooth turning, and long-term reliability even in demanding restoration or remediation environments.

Built to OEM standards, the knob complements the rugged ABS housing of the X-3400, ensuring that it withstands regular usage and transport without cracking or wearing down. Whether the original knob has become brittle, worn, or lost, this replacement restores full tactile feedback and control, making it easier to fine-tune airflow for various job conditions. Ideal for professional restorers, contractors, and anyone relying on the X-3400 for high-performance air filtration, this spare part helps keep your air scrubber operating smoothly and securely.