Rockford rcb-120 – catch basin – 24-1/2″ l x 48-1/2″ w x 38″ h – steel a rockford separator is designed for exceptionally high efficiency in retaining a wide variety of insoluble wastes. Maximum water travel with minimized turbulence through the filtering action of its screens prevents evacuation into drainage systems which may cause blocking, stoppages and backups. The rcb series is a catch basin for commercial drainage applications.