Replaceable flush valve seat assembly

A replaceable flush valve seat assembly which eliminates the need to dismantle a toilet for replacement of a flush valve body having a worn out sealing surface, the flush valve body extending between a tank and a bowl of the toilet, and incorporating a circumferential lip just beneath the sealing surface, the assembly comprising a sealing ring having a groove therein of a diameter equal to a diameter of the sealing surface and a seating ring having at least one groove therein within which the sealing ring is received, the seating ring further including a plurality of downwardly extending arms each having an inwardly extending end flange thereon, the end flange of each arm engaging under the circumferential lip of the flush valve body when positioned over the flush valve body sealing surface, trapping the sealing surface within the groove of the sealing ring and having a top surface which forms the valve seat.