Eureka Sanitaire 12" Red Vacuum Base Assembly (55726-1) 3067 the bristles agitate the fibers

the bristles agitate the fibers to loosen embedded dirt and debris so the central vacuum's airflow can lift it away

and a loose cover allows dust to escape the filter bay and reduce suction

Bristle: soft horsehair for scratch-free hard-floor cleaning

The most common failures here are worn seals that begin to drip and corroded stems that start to stick

Set in the airflow path

Eureka Sanitaire 12" Red Vacuum Base Assembly (55726-1) 3067 the bristles agitate the fibersThis 12 inch red base (Part #52398 1, also referenced as 55726 1) is the lower housing that carries the brush roll, nozzle, and floor contact components on Eureka Sanitaire commercial upright vacuums. The base is the part that takes the most punishment on a hard working machine, scraping against baseboards, furniture, and floor transitions until cracks or wear compromise airflow and brush alignment. Replacing a damaged base restores the proper seal