A side-opening sleeve valve having an inner cylindrical barrel with a shaped opening through the wall, an outer cylindrical barrel having shaped opening through the wall, where the barrels are co-annular and rotatable, and a means for rotating the inner barrel relative to the outer barrel between a first open position where the shaped openings overlap to form a side opening into the sleeve valve, and a second closed position where the shaped openings do not overlap. A side-opening valve is used in pigging fluid flush system for a water-less toilet, where a toilet bowl empties into the side opening of the side-opening valve when opened. When the side-opening valve is closed, a pig cleaning system pushes the waste in the side-opening valve to a sewage system.

A toilet has a first bowl connected via internal passages to a water tank having a hand-operable valve, one or more remotely-operable spray openings, directed upward, and a connected passage to a sewer line, and a second bowl, rotatable and joined to the first bowl, and operable by a lever in a manner that the second bowl maintains an upright position, or an inverted position facing downward into the first bowl, Urine or feces in the second bowl at a time of moving the lever from the first position to the second position, as the second bowl is moved to the inverted position, is dropped into the first bowl, the second bowl, inverted, is spray-cleaned by operation of the spray openings, and the cleaned second bowl is returned to upright position by moving the lever back to the first position.

A toilet has a first bowl connected via internal passages to a water tank having a hand-operable valve, one or more remotely-operable spray openings, directed upward, and a connected passage to a sewer line, and a second bowl, rotatable and joined to the first bowl, and operable by a lever in a manner that the second bowl maintains an upright position, or an inverted position facing downward into the first bowl, Urine or feces in the second bowl at a time of moving the lever from the first position to the second position, as the second bowl is moved to the inverted position, is dropped into the first bowl, the second bowl, inverted, is spray-cleaned by operation of the spray openings, and the cleaned second bowl is returned to upright position by moving the lever back to the first position.

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 check valve comprising, between an inlet end and an opposite outlet end along a common longitudinal axis, optionally an adapter arranged between the inlet end and a seal seat, a seal seat formed by a rigid scaffold, a closure element formed by an elastic closure part, optionally a stop ball, and optionally a stop that can be latched to the scaffold, wherein the scaffold and the closure part are shaped to match one another in the region of the seal seat, and the closure part is tensioned against the scaffold in the region of the seal seat in the rest position and is retained therein, wherein the scaffold has breaches in the region of the seal seat, and the closure element is formed in one piece with a venting device

A check valve comprising, between an inlet end and an opposite outlet end along a common longitudinal axis, optionally an adapter arranged between the inlet end and a seal seat, a seal seat formed by a rigid scaffold, a closure element formed by an elastic closure part, optionally a stop ball, and optionally a stop that can be latched to the scaffold, wherein the scaffold and the closure part are shaped to match one another in the region of the seal seat, and the closure part is tensioned against the scaffold in the region of the seal seat in the rest position and is retained therein, wherein the scaffold has breaches in the region of the seal seat, and the closure element is formed in one piece with a venting device

A toilet waste water drain structure intended to be used in sanitary ware industry, without requiring a reservoir in order to save water, includes a toilet on which the user sits, a clean water inlet through which clean water enters the mentioned toilet, and a waste filling chamber into which user defecates and where the clean water and the waste water is stored. The structure also includes a cover which is connected to inside of the toilet in order to ensures the contaminated water to be discharged by its own weight by opening, a drive element which provides the required drive for the motion of the cover, a control element which controls the flow of the water into and out of the toilet, and a starter element used to operate the system.

A toilet waste water drain structure intended to be used in sanitary ware industry, without requiring a reservoir in order to save water, includes a toilet on which the user sits, a clean water inlet through which clean water enters the mentioned toilet, and a waste filling chamber into which user defecates and where the clean water and the waste water is stored. The structure also includes a cover which is connected to inside of the toilet in order to ensures the contaminated water to be discharged by its own weight by opening, a drive element which provides the required drive for the motion of the cover, a control element which controls the flow of the water into and out of the toilet, and a starter element used to operate the system.

A toilet device may include a bowl portion having an interior volume and an interior surface. The device may further include a waste channel connected to the interior volume of the bowl portion through an opening in the interior surface. It may also include a rim positioned above the bowl portion and defining a lip that overhangs from the interior surface of the bowl portion. It may include a nipple molded into the bowl portion of the toilet bowl and protruding from the interior surface underneath the lip, where the nipple may include an egress channel connected to the interior volume of the bowl portion of the toilet bowl. It may further include a ventilation channel connected to the egress channel of the nipple at a first end of the ventilation channel and connected to a downstream portion of the waste channel at a second end of the ventilation channel.