A complete internal rebuild kit for the 1” MOMENTUM® flush valve. This kit will rebuild all I-CON 3700 and 3800 model MOMENTUM® flush valves. Kit includes the valve’s seat seal, a 3801 model flush valve support ring (marked with “38” on the left & “SR” on the right side of a rib found on the arc of the ring), a 3711 model flush valve support ring, pressure separation gasket, metering plug and O-rings, strainer screen, discharge port O-ring and stand cup allowing for the rebuilt valve to meet the standards of a new MOMENTUM® flush valve.