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A flush valve handle assembly and a check valve assembly are provided for use in a flush valve, wherein the flush valve handle assembly and check valve assembly include improved components. The flush valve handle assembly includes a ball member and a plunger rod, one or both of which can be construc

A flush valve handle assembly and a check valve assembly are provided for use in a flush valve, wherein the flush valve handle assembly and check valve assembly include improved components. The flush valve handle assembly includes a ball member and a plunger rod, one or both of which can be constructed of a polymeric material. An improved flush file retainer is provided which includes at least one ear integrally formed around a circumferential portion thereof. This at least one ear secures the flush file retainer in a snap-fit configuration in the socket-coupling. The check valve assembly includes a piston/seal having a plurality of ribs having a tapered design extending outwardly from a circumferential periphery of the piston/seal. The piston/seal includes a sealing material located on a top surface thereof. This sealing material can be a thermoplastic elastomeric coating material.

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1. A piston/seal for use with a flush valve check valve assembly, wherein the piston/seal includes a plurality of ribs having a tapered design extending outwardly from a circumferential periphery of the piston/seal, the piston/seal having a top surface comprising a gate passageway having a center po

1. A piston/seal for use with a flush valve check valve assembly, wherein the piston/seal includes a plurality of ribs having a tapered design extending outwardly from a circumferential periphery of the piston/seal, the piston/seal having a top surface comprising a gate passageway having a center portion, a plurality of outwardly extending spokes leading to a circular recess adjacent a circumferential edge of the top surface,wherein a sealing material is positioned within said gate passageway of said top surface including the circular recess to form an annular seal extending above a top surface of a piston body, said annular seal being adapted to seal with a seat of a stop within the check valve assembly at a location adjacent to a water source inlet. 2. A check valve, comprising: a valve body defining an inlet connection and an outlet connection, said inlet connection adapted for association with a water supply and said outlet connection adapted for association with a flush valve;a piston/seal positioned within said valve body, said piston/seal having a top surface adapted for biasing against a valve seat of said inlet connection, said piston/seal including a plurality of ribs having a tapered design extending from said top surface in an outwardly direction from a circumferential periphery thereof to a stopping surface of said piston/seal,wherein said plurality of ribs are tapered from the circumferential periphery to the stopping surface of said piston/seal, andwherein said top surface includes a sealing material positioned thereon,the top surface comprising a gate passageway having a center portion, a plurality of outwardly extending spokes leading to a circular recess adjacent the circumferential edge of the top surface, andwherein a sealing material is positioned within said gate passageway of said top surface including the circular recess to form an annular seal extending above a top surface of a piston body, said annular seal being adapted to seal with a seat of a stop within the check valve assembly at a location adjacent to a water source inlet.