Mfr # RP-20. Rockford rp-20 - 3" grease interceptor - 77 lbs capacity - 20 gpm - 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 rp series is a grease interceptor w/external flow control fitting, designed and approved in accordance with pdi g-101. These are available from 4 gpm - 500 gpm. Upc/iapmo approved.