A flush toilet includes a toilet main body and a tank device. The tank device includes a storage tank, and a water supply unit configured to supply flush water to the storage tank. The storage tank includes a first upper surface including a water passage port through which the flush water supplied from the water supply unit flows into the storage tank, a second upper surface that is lower than the first upper surface, and a third upper surface that is provided between the first upper surface and the second upper surface and that is lower than the second upper surface. The storage tank further includes an air vent unit that is provided at the second upper surface and that is configured to purge air from the storage tank.

An example vacuum-assisted toilet includes a toilet bowl including an outlet. The outlet of the toilet bowl is fluidly coupled to a first flush valve, for example, using a first pipe. The first flush valve is fluidly coupled to a second flush valve that is positioned downstream from the first flush valve. For example, the first flush valve may be fluidly coupled to the second flush valve using a second pipe. The second flush valve is fluidly coupled to a vacuum source. The vacuum source may include, for example, a holding tank having a vacuum pressure therein, a vacuum pump, or any other suitable vacuum source.

An example vacuum-assisted toilet includes a toilet bowl including an outlet. The outlet of the toilet bowl is fluidly coupled to a first flush valve, for example, using a first pipe. The first flush valve is fluidly coupled to a second flush valve that is positioned downstream from the first flush valve. For example, the first flush valve may be fluidly coupled to the second flush valve using a second pipe. The second flush valve is fluidly coupled to a vacuum source. The vacuum source may include, for example, a holding tank having a vacuum pressure therein, a vacuum pump, or any other suitable vacuum source.

A flush valve apparatus comprising a main body, an outer cover, an inner cover, a valve assembly, and a back-pressure chamber, wherein the outer cover is coupled to an upper end of the main body, the inner cover is positioned over the valve assembly and under the outer cover, the valve assembly comprises a valve body and is positioned at an interior of the main body, the back-pressure chamber is defined by a lower surface of the inner cover and an upper surface of the valve assembly, and wherein one or more springs are positioned substantially vertically in the back-pressure chamber. The one or more springs are effective towards minimizing flush water variation between flush cycles and towards attenuation flush valve erratic behavior.

A flush valve apparatus comprising a main body, an outer cover, an inner cover, a valve assembly, and a back-pressure chamber, wherein the outer cover is coupled to an upper end of the main body, the inner cover is positioned over the valve assembly and under the outer cover, the valve assembly comprises a valve body and is positioned at an interior of the main body, the back-pressure chamber is defined by a lower surface of the inner cover and an upper surface of the valve assembly, and wherein one or more springs are positioned substantially vertically in the back-pressure chamber. The one or more springs are effective towards minimizing flush water variation between flush cycles and towards attenuation flush valve erratic behavior.

The disclosure includes a water sounds noise maker and wall mount for inducing urination. The noise maker is battery powered, and mounts to the wall for convenience or may be worn or mounted by other means. Battery power sources include but are not limited to power sources which are rechargeable, plug-in and solar powered options. The invention contains three settings for duration of sounds, three options for sounds, and volume control. The disclosure manages inducing urination for clients by recording and playing various water sounds. Various prerecorded water noises from sources outside a housing of the disclosure, are also reproduced to induce urination.

The disclosure includes a water sounds noise maker and wall mount for inducing urination. The noise maker is battery powered, and mounts to the wall for convenience or may be worn or mounted by other means. Battery power sources include but are not limited to power sources which are rechargeable, plug-in and solar powered options. The invention contains three settings for duration of sounds, three options for sounds, and volume control. The disclosure manages inducing urination for clients by recording and playing various water sounds. Various prerecorded water noises from sources outside a housing of the disclosure, are also reproduced to induce urination.

A noise reduction structure for a toilet tank includes a pressure-assisted flush water tank, a fluid input device, a guide pipe, and a stop member. The fluid input device is disposed on a top of the pressure-assisted flush water tank. The fluid input device is configured to input a fluid having water and air to the pressure-assisted flush water tank. The guide pipe has an input end communicating with an output end of the fluid input device. The stop member includes a stop plate opposite to an output end of the guide pipe. After being stopped by the stop plate, the fluid spreads and flows toward an edge of the stop plate.

A noise reduction structure for a toilet tank includes a pressure-assisted flush water tank, a fluid input device, a guide pipe, and a stop member. The fluid input device is disposed on a top of the pressure-assisted flush water tank. The fluid input device is configured to input a fluid having water and air to the pressure-assisted flush water tank. The guide pipe has an input end communicating with an output end of the fluid input device. The stop member includes a stop plate opposite to an output end of the guide pipe. After being stopped by the stop plate, the fluid spreads and flows toward an edge of the stop plate.

An example vacuum-assisted toilet includes a toilet bowl including an outlet. The outlet of the toilet bowl is fluidly coupled to a first flush valve, for example, using a first pipe. The first flush valve is fluidly coupled to a second flush valve that is positioned downstream from the first flush valve. For example, the first flush valve may be fluidly coupled to the second flush valve using a second pipe. The second flush valve is fluidly coupled to a vacuum source. The vacuum source may include, for example, a holding tank having a vacuum pressure therein, a vacuum pump, or any other suitable vacuum source.