Abstract: A toilet tank flush valve structure includes a valve base. A float assembly that is adjustable in buoyancy is movable between a sealing position and a flushing position. An overflow tube is attached to the float assembly and extends from a lower end in communication with a water outflow passage of the valve base to an upper end in communication with the interior space of the toilet tank. The upper end of the overflow tube is adjustable relative to the float assembly independently of the buoyancy of the float assembly. A guide member guides movement of the float assembly. A stop member on the guide member limits upward travel of the float assembly from its sealing position. The stop member is adjustable in position lengthwise of the guide member or by extension of the guide member independently of the buoyancy of the float assembly.

Abstract: A toilet tank flush valve structure includes a valve base. A float assembly is movable relative to the valve base between a sealing position and a flushing position, the float assembly being adjustable in buoyancy. An overflow tube is attached to the float assembly and extends upward from a lower end in fluid communication with the water outflow passage of the valve base to an upper end in fluid communication with the interior space of the toilet tank. The upper end of the overflow tube is adjustable relative to the float assembly independently of the buoyancy of the float assembly. A guide member extends upward from the valve base for guiding movement of the float assembly relative to the valve base. A stop member is mounted on the guide member at a location above the float assembly for limiting upward travel of the float assembly from its sealing position.

Abstract: A toilet tank flush valve structure includes a valve base. A float assembly that is adjustable in buoyancy is movable between a sealing position and a flushing position. An overflow tube is attached to the float assembly and extends from a lower end in communication with a water outflow passage of the valve base to an upper end in communication with the interior space of the toilet tank. The upper end of the overflow tube is adjustable relative to the float assembly independently of the buoyancy of the float assembly. A guide member guides movement of the float assembly. A stop member on the guide member limits upward travel of the float assembly from its sealing position. The stop member is adjustable in position lengthwise of the guide member or by extension of the guide member independently of the buoyancy of the float assembly.

Abstract: A toilet tank flush valve structure includes a valve base for installation in the outlet hole formed in the floor of a toilet tank and defining a water outflow passage and including a first valve member at the upper end of the water outflow passage. A float assembly is movable relative to the valve base between a sealing position in which a second valve member at a lower end of the float assembly engages the first valve member in sealing relationship and a flushing position in which the second valve member is spaced upwardly from the first valve member. The float assembly includes an outer shell that is open downwards and has a lower edge at which the shell is provided with the second valve member, and a closure member within the outer shell and cooperating with the outer shell to define a float chamber. The closure member is adjustable in position relative to the outer shell, whereby the float chamber is adjustable in volume.

Abstract: A toilet tank flush valve structure, for use with a toilet tank having a floor formed with an opening, includes a base for installation in the opening formed in the floor of the toilet tank. The base defines a water outflow passage having an upper end at which the passage has an area A1 and a lower end at which the passage has an area A2 and includes a valve seat at the upper end of the water outflow passage. A flush valve is movable relative to the base between a sealing position in which the valve engages the valve seat in sealing relationship and a flushing position in which the valve is spaced upwardly from the valve seat. The area A1 is substantially greater than the area A2.

Abstract: A toilet tank flush valve structure includes a valve base for installation in the outlet hole formed in the floor of a toilet tank and defining a water outflow passage and including a first valve member at the upper end of the water outflow passage. A float assembly is movable relative to the valve base between a sealing position in which a second valve member at a lower end of the float assembly engages the first valve member in sealing relationship and a flushing position in which the second valve member is spaced upwardly from the first valve member. The float assembly includes an outer shell that is open downwards and has a lower edge at which the shell is provided with the second valve member, and a closure member within the outer shell and cooperating with the outer shell to define a float chamber. The closure member is adjustable in position relative to the outer shell, whereby the float chamber is adjustable in volume.

Abstract: A toilet tank flush valve structure, for use with a toilet tank having a floor formed with an opening, includes a base for installation in the opening formed in the floor of the toilet tank. The base defines a water outflow passage having an upper end at which the passage has an area A1 and a lower end at which the passage has an area A2 and includes a valve seat at the upper end of the water outflow passage. A flush valve is movable relative to the base between a sealing position in which the valve engages the valve seat in sealing relationship and a flushing position in which the valve is spaced upwardly from the valve seat. The area A1 is substantially greater than the area A2.

Abstract: A dual flush-volume toilet system is disclosed, wherein the toilet system includes a low volume flush valve configured to flush a first, lesser volume of water, a high volume flush valve configured to flush a second, greater volume of water, a low volume flush handle configured to open the low volume flush valve, and a high volume flush handle configured to open the high volume flush valve. At least one of the low volume flush handle and the high volume flush handle includes indicia configured to indicate to the user which of the high volume flush valve and the low volume flush valve is opened by the flush handle having the indicia.

Abstract: A modular outflow valve assembly for a toilet tank is disclosed. The modular outflow valve assembly includes a lower outflow tube section configured to be mounted to a toilet tank to pass water out of the toilet tank, wherein the lower outflow tube section has a high-volume flush valve configured to flush a first, higher volume of water when opened; an upper outflow tube section having a low-volume flush valve configured to flush a second, lower volume of water out of the toilet tank when opened, wherein the lower outflow tube section is configured to receive attachment of the upper outflow tube section to form a dual flush-volume configuration; and an overflow tube section, wherein the lower outflow tube section is configured to receive attachment of the overflow tube section in place of the upper outflow tube section to form a single flush-volume configuration.

Abstract: A dual flush-volume outflow valve assembly for a toilet tank is provided. The outflow valve assembly comprises a base having an opening configured to pass water out of the toilet tank, a lower outflow tube section extending upwardly from the base, and an upper outflow tube section adjustably coupled to and extending upwardly from the lower outflow tube section. The lower outflow tube has a hollow interior and includes a high-volume flush valve positioned to pass a first, larger volume of water from the toilet tank to the toilet bowl when opened. The upper outflow tube section has a hollow interior and includes a low-volume flush valve positioned to pass a second, smaller volume of water from the toilet tank to the toilet bowl when opened. In some embodiments, the hollow interiors of the upper outflow tube section and the lower outflow tube section are positioned over and in line with the opening.

Abstract: A modular outflow valve assembly for a toilet tank is disclosed. The modular outflow valve assembly includes a lower outflow tube section configured to be mounted to a toilet tank to pass water out of the toilet tank, wherein the lower outflow tube section has a high-volume flush valve configured to flush a first, higher volume of water when opened; an upper outflow tube section having a low-volume flush valve configured to flush a second, lower volume of water out of the toilet tank when opened, wherein the lower outflow tube section is configured to receive attachment of the upper outflow tube section to form a dual flush-volume configuration; and an overflow tube section, wherein the lower outflow tube section is configured to receive attachment of the overflow tube section in place of the upper outflow tube section to form a single flush-volume configuration.

Abstract: A dual flush-volume outflow valve assembly for a toilet tank is provided. The outflow valve assembly comprises a base having an opening configured to pass water out of the toilet tank, a lower outflow tube section extending upwardly from the base, and an upper outflow tube section adjustably coupled to and extending upwardly from the lower outflow tube section. The lower outflow tube has a hollow interior and includes a high-volume flush valve positioned to pass a first, larger volume of water from the toilet tank to the toilet bowl when opened. The upper outflow tube section has a hollow interior and includes a low-volume flush valve positioned to pass a second, smaller volume of water from the toilet tank to the toilet bowl when opened. In some embodiments, the hollow interiors of the upper outflow tube section and the lower outflow tube section are positioned over and in line with the opening.

Abstract: A dual flush-volume outflow valve assembly for a toilet tank is provided. The outflow valve assembly comprises a base having an opening configured to pass water out of the toilet tank, a lower outflow tube section extending upwardly from the base, and an upper outflow tube section adjustably coupled to and extending upwardly from the lower outflow tube section. The lower outflow tube has a hollow interior and includes a high-volume flush valve positioned to pass a first, larger volume of water from the toilet tank to the toilet bowl when opened. The upper outflow tube section has a hollow interior and includes a low-volume flush valve positioned to pass a second, smaller volume of water from the toilet tank to the toilet bowl when opened. In some embodiments, the hollow interiors of the upper outflow tube section and the lower outflow tube section are positioned over and in line with the opening.

Abstract: A dual flush-volume outflow valve assembly for a toilet tank is provided. The outflow valve assembly comprises a base having an opening configured to pass water out of the toilet tank, a lower outflow tube section extending upwardly from the base, and an upper outflow tube section adjustably coupled to and extending upwardly from the lower outflow tube section. The lower outflow tube has a hollow interior and includes a high-volume flush valve positioned to pass a first, larger volume of water from the toilet tank to the toilet bowl when opened. The upper outflow tube section has a hollow interior and includes a low-volume flush valve positioned to pass a second, smaller volume of water from the toilet tank to the toilet bowl when opened. In some embodiments, the hollow interiors of the upper outflow tube section and the lower outflow tube section are positioned over and in line with the opening.

Abstract: The present invention concerns a dual-flush toilet system. The toilet system includes a toilet tank having a wall, a high-volume flush valve disposed within the toilet tank and operable to flush a first, higher volume of water, a low-volume flush valve disposed within the toilet tank and operable to flush a second, lower volume of water, and a flush mechanism configured to operate the high-volume flush valve and the low-volume flush valve.

Abstract: A dual flush-volume outflow valve assembly for a toilet tank is provided. The valve assembly includes a base having an opening for passing water out of the toilet tank, a lower outflow tube section extending upwardly from the base, the lower outflow tube section having a hollow interior and including a high-volume flush valve configured to pass a first, larger volume of water from the toilet tank to the toilet bowl when opened, and an upper outflow tube section slidably coupled to and extending upwardly from the lower outflow tube section, the upper outflow tube section having a hollow interior and at least partially forming a low-volume flush valve configured to pass a second, smaller volume of water from the toilet tank to the toilet bowl when opened.