A flush toilet includes a toilet main body made of ceramics and a control unit. The toilet main body includes a skirt, and a rear storage that can store at least a part of the control unit, the rear storage includes a supporting wall that divides a storage region into upper and lower regions and that supports the control unit, the skirt forms a double wall including an outer wall and an inner wall, the double wall has at least a part that forms an internal space between the outer wall and the inner wall, and the skirt includes a single wall in which the internal space of the double wall is removed in an upper end above a joining portion between the double wall and the supporting wall.

A flush toilet includes a toilet main body made of ceramics and a control unit. The toilet main body includes a skirt, and a rear storage that can store at least a part of the control unit, the rear storage includes a supporting wall that divides a storage region into upper and lower regions and that supports the control unit, the skirt forms a double wall including an outer wall and an inner wall, the double wall has at least a part that forms an internal space between the outer wall and the inner wall, and the skirt includes a single wall in which the internal space of the double wall is removed in an upper end above a joining portion between the double wall and the supporting wall.

A flush toilet according to the present invention includes a bowl including a well portion, and a discharge trap conduit, the well portion includes a bottom wall formed above and in front of an inlet of the discharge trap conduit, a side wall formed to surround the bottom wall, and a connecting portion that connects an outer edge of the bottom wall and a lower edge of the side wall, the bottom wall of the well portion includes an inclined portion, and guiding portions that are formed on left and right outer sides of the inclined portion and that guide flush water or waste from front toward the inlet of the discharge trap conduit, and the inclined portion, in a side cross-sectional view, is entirely formed into an upwardly convex shape and formed to be inclined downward from front toward the inlet of the discharge trap conduit.

A flush toilet according to the present invention includes a bowl including a well portion, and a discharge trap conduit, the well portion includes a bottom wall formed above and in front of an inlet of the discharge trap conduit, a side wall formed to surround the bottom wall, and a connecting portion that connects an outer edge of the bottom wall and a lower edge of the side wall, the bottom wall of the well portion includes an inclined portion, and guiding portions that are formed on left and right outer sides of the inclined portion and that guide flush water or waste from front toward the inlet of the discharge trap conduit, and the inclined portion, in a side cross-sectional view, is entirely formed into an upwardly convex shape and formed to be inclined downward from front toward the inlet of the discharge trap conduit.

A siphonic flush toilet system and method of priming the same having a toilet bowl assembly comprising at least one jet flush valve assembly and at least one rim valve; and bowl having a rim and a jet defining at least one jet channel. The bowl has a closed jet pathway to maintain the jet channel in a primed state with fluid from the jet flush valve assembly to prevent air from entering the closed jet pathway. Flush valves may have back-flow preventer mechanisms and/or at least partly flexible valve covers, including specific valve cover structures. Flush activation assemblies may have a flush activation bar connected to the pivot rod and/or an adjustable flush connector located between the pivot rod and the flush activation bar. A kit providing one or more flush activation elements is included. The kit elements may be usable with the toilet systems and methods described.

A siphonic flush toilet system and method of priming the same having a toilet bowl assembly comprising at least one jet flush valve assembly and at least one rim valve; and bowl having a rim and a jet defining at least one jet channel. The bowl has a closed jet pathway to maintain the jet channel in a primed state with fluid from the jet flush valve assembly to prevent air from entering the closed jet pathway. Flush valves may have back-flow preventer mechanisms and/or at least partly flexible valve covers, including specific valve cover structures. Flush activation assemblies may have a flush activation bar connected to the pivot rod and/or an adjustable flush connector located between the pivot rod and the flush activation bar. A kit providing one or more flush activation elements is included. The kit elements may be usable with the toilet systems and methods described.

The bowl portion of the flush toilet includes a bowl-shaped waste receiving surface and a rim portion formed on a top edge of the bowl portion. The rim portion includes a rim inside wall portion located on an inner side of the top edge of the bowl portion. The rim inside wall portion has a rim inside surface located at a lower area of the rim inside wall portion and a rim inside wall upper sloped surface having a section in a vertical plane, the shape of the section being sloped from an upper edge of the rim inside surface to an upper edge of the rim inside wall portion. The ratio between the height of the rim inside surface and the height of the rim inside wall upper sloped surface is 1:1 to 6:1 in a section in a vertical plane at any area other than a rear area.

The bowl portion of the flush toilet includes a bowl-shaped waste receiving surface and a rim portion formed on a top edge of the bowl portion. The rim portion includes a rim inside wall portion located on an inner side of the top edge of the bowl portion. The rim inside wall portion has a rim inside surface located at a lower area of the rim inside wall portion and a rim inside wall upper sloped surface having a section in a vertical plane, the shape of the section being sloped from an upper edge of the rim inside surface to an upper edge of the rim inside wall portion. The ratio between the height of the rim inside surface and the height of the rim inside wall upper sloped surface is 1:1 to 6:1 in a section in a vertical plane at any area other than a rear area.

A flush toilet wherein the rim inside wall portion comprises a rim inside wall upper sloped surface, and an improvement in user visibility and user rim portion cleanability is sought, flush water can be constrained from splashing outside the bowl portion by traveling by centrifugal force along the rim inside wall upper sloped surface from the inside surface formed at a relatively low height. The rim portion of the flush toilet of the invention includes a rim inside wall portion; the rim inside wall portion comprises a rim inside wall upper sloped surface, and an inside surface vertically extending straight up to the rim inside wall upper sloped surface; and the water supply apparatus comprises a constant flow rate valve for spouting a predetermined constant flow rate of flush water from the water spouting portion.

A siphonic flush toilet system and method of priming the same having a toilet bowl assembly comprising at least one jet flush valve assembly and at least one rim valve; and bowl having a rim and a jet defining at least one jet channel. The bowl has a closed jet pathway to maintain the jet channel in a primed state with fluid from the jet flush valve assembly to prevent air from entering the closed jet pathway. Flush valves may have back-flow preventer mechanisms and/or at least partly flexible valve covers, including specific valve cover structures. Flush activation assemblies may have a flush activation bar connected to the pivot rod and/or an adjustable flush connector located between the pivot rod and the flush activation bar. A kit providing one or more flush activation elements is included. The kit elements may be usable with the toilet systems and methods described.