There are 7 round brushes on the bottom and they spin while the cleaner is on "wash" I am so happy with this cleaner...I had borrowed one from my mother and it is not available to purchase any longer (a Hoover) but this one is better because it picks up the dirty water and you don't have to go back with a mop after you scrub.

I have an older model and had the same problem so I went on the Hoover parts web site and ordered the part that does that function

Take it apart and clean it. Check to be sure you have it on "wash" or "wet pickup". If that doesn't work, look in your yellow pages for a private Hoover dealer who does repairs. If not, you might as well buy a new one -- it'll cost you that much to ship it to Hoover for repair.

This is what it says in the details Shipping Weight (in pounds): 35.0
Product in Inches (L x W x H): 12.0 x 15.0 x 35.25