Abstract: A brush assembly includes a base and a cover which is mounted on the base. A plurality of first brushes are removably received in the base and a plurality of second brushes are connected to an under side of the cover. An extension pipe is connected to the underside of the cover and a plurality of outlet tubes extend from the extension pipe. An inlet pipe is connected to the cover and communicates with the extension pipe so as to intrusion detergent into the extension pipe and spread from the outlet pipes to which the second brushes are connected.