Vacuum Height Adjustment Knob - Bissell 3540 Durable Plastic, Fits Bissell 3540, Part #313-3724,3133724

The Bissell Height Adjustment Knob #3133724 is a genuine replacement part designed specifically for the Bissell 3540 upright vacuum, allowing you to easily select the ideal carpet height setting for optimal cleaning on any surface. Crafted from durable molded plastic, this knob ensures a secure grip and long-lasting performance, restoring full adjustability to your vacuum’s height control system. By maintaining the correct height setting, this part helps preserve strong suction and consistent cleaning results, while also protecting the vacuum motor from debris buildup that can compromise airflow and filtration. Regular replacement of this adjustment knob supports improved air quality by reducing dust, fine particles, and allergens, making it an essential component for homeowners, pet owners, and allergy-sensitive households who rely on their vacuum for a cleaner, healthier home environment. For more information about potential exposure to chemicals, visit For more information about potential exposure to chemicals, visit www.P65Warnings.ca.gov.