A plastic floor drain for use with a floor sink in which a thin lip is provided around the outside of an upper edge to provide good engagement with the sides of the floor sink to prevent leakage between the sides of the floor sink and the sides of the floor drain. Also, in order to provide controlled...http://www.google.com.au/patents/US20020070151?utm_source=gb-gplus-sharePatent US20020070151 - Floor sink filter basket
