Abstract: An improved relief valve for use in a diaphragm flush valve is constructed having a sealing member provided with an exteriorly threaded shaft extending down into the diaphragm flush valve with a smaller diameter metal stem extending from the bottom of the shaft, a sleeve member slidable along the metal stem and having a vertically aligned slit in its side wall, and a retaining member adjustably vertically positioned on the threaded sealing member shaft, wherein the retaining member having a stop element extendable into the vertical slit to prevent the sleeve member from dropping further than a predetermined distance from the bottom of the threaded shaft.

Abstract: An improved relief valve for use in a diaphragm flush valve is constructed having a sealing member provided with an exteriorly threaded shaft extending down into the diaphragm flush valve with a smaller diameter metal stem extending from the bottom of the shaft, a tube member having a passageway formed by the interior surface wall of the tube member, the interior surface wall having an upper threaded portion to permit the tube member to be screwed to the shaft, and a sleeve member slidable along the metal stem with the sleeve member upper end positioned in the tube member passageway and retained in the passageway by a stop forming part of the tube member.

Abstract: An improved water closet flushing system utilizing a diaphragm flush valve having a fluid flow control means positioned to receive the fluid discharged from the diaphragm flush valve prior to fluid entering the water closet bowl.

Abstract: An improved water closet flushing system utilizing a diaphragm flush valve having a fluid flow control means positioned to receive the fluid discharged from the diaphragm flush valve prior to fluid entering the water closet bowl.

Abstract: Apparatus for delaying initiation of a successive flush cycle in a plumbing system utilizing a diaphragm flush valve having an improved relief valve assembly structured to delay after initiation of an initial flushing cycle the resetting of the relief valve sleeve member in a position for a successive operative contact by the flush valve plunger pin.

Abstract: Apparatus for delaying initiation of a successive flush cycle in a plumbing system utilizing a diaphragm flush valve having a relief valve assembly provided with a buoyant relief valve sleeve member that can rise in water trapped in the relief valve assembly to a position that prevents operative contact by the flush valve plunger pin.

Abstract: Apparatus for delaying initiation of a successive flush cycle in a plumbing system utilizing a diaphragm flush valve having an improved relief valve assembly and/or an improved vacuum breaker assembly structured to delay after initiation of an initial flushing cycle the resetting of the relief valve sleeve member in a position for a successive operative contact by the flush valve plunger pin.

Abstract: A flush valve extension assembly retrofittable to a conventional water closet is disclosed which comprises a tube having a shoulder member extending outward from the outer surface of the tube in a position to form an upper section of the first tube having a predetermined length and to form a lower section of the tube which can extend into the flush valve seat, the shoulder member being sized to seat on the valve seat; a gasket fittable about the outer surface of the lower section in a position to form a water tight seal between the shoulder member and the flush valve seat; and a means fixable to the tube and extending about the overflow tube in a manner to attach the tube to the flush valve.

Abstract: A retractable guard for use in combination with a sewage pipe leading from a flush toilet is provided having a plurality of prongs with hooked ends positioned within a cross section of the pipe. The prongs are connected to a piston which is slidable within a cylinder, perpendicular to the pipe. Flushing the toilet causes water to be directed in the cylinder which in turn partially retracts the prongs. Water may be diverted from the cylinder to wash accumulated debris from the prongs.

Abstract: A flush control assembly for delaying the flush cycle of pressure flush valves for use on plumbing fixtures. The flush control assembly attaches to, and becomes an integral working part of the flush valve and contains a delaying means which is actuated by water pressure differentials in the flush valve.

Abstract: A retractable guard for use in combination with a sewage pipe leading from a flush toilet is provided having a plurality of prongs with hooked ends positioned within a cross section of the pipe. The prongs are connected to a piston which is slidable within a cylinder, perpendicular to the pipe. Flushing the toilet causes water to be directed in the cylinder which in turn partially retracts the prongs. Water may be diverted from the cylinder to wash accumulated debris from the prongs.

Abstract: A retractable guard for use in combination with a sewage pipe leading from a flush toilet is provided having a plurality of prongs with hooked ends positioned within a cross section of the pipe. The prongs are connected to a piston which is slidable within a cylinder, perpendicular to the pipe. Flushing the toilet causes water to be directed in the cylinder which in turn partially retracts the prongs. Water may be diverted from the cylinder to wash accumulated debris from the prongs.