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 at least one jet channel having an inlet port and a jet outlet port configured for discharging fluid to a sump area, wherein the sump area is in fluid communication with a trapway. The bowl has a closed jet pathway including the jet channel and extending from the jet flush valve assembly outlet to the jet channel outlet port to maintain the jet channel in a primed state with fluid from the jet flush valve assembly so as to assist in preventing air from entering the closed jet pathway. Flush valves are also disclosed having back-flow preventer mechanisms and/or at least partly flexible valve covers for use with the toilet systems and methods herein.

A low-noise pressure flushing system includes a flush valve, a first flush tube, and the check valve. The first flush tube is connected to a water output end of the flush valve. The second flush tube is connected to the water output end of the flush valve. The check valve is disposed at a water output end of the first flush tube. Also disclosed is a toilet device, that includes and utilizes the low-noise pressure flushing system mentioned above, to reduce the noise significantly during toilet flushing.

A pressure-assisted flush water tank includes a fluid container, a Venturi nozzle, a baffle and a buoy. The fluid container has an accommodating chamber, a water channel and an air channel. The accommodating chamber has a fluid inlet. The water channel and the air channel are in communication with the fluid inlet. The Venturi nozzle is disposed at a junction of the water channel and the fluid inlet. The baffle is configured to seal the air inlet in a movable manner. The buoy is disposed on an inner side of the air inlet. The top end of the buoy leans against the baffle. The buoy rises under internal pressure of the fluid container until the air inlet is closed. Before the buoy closes the air inlet, the protruding post abuts against and lifts up the baffle to open the air inlet.

A quiet toilet apparatus disclosed. Microphones and circuitry are used to receive and detect one or more virtual point source locations and propagation directions of unwanted toilet noise. Speakers are used to create one or more synthesized wave fronts resulting in cancelation and reduction of unwanted toilet noise. The speakers, microphones and circuitry may be located within a toilet seat of a toilet or at a remote location. A user device or remote device may be connected to the noise reduction toilet apparatus for data recording, collection, reporting, and electronic noise filtering.

A toilet is provided with a water replenishing device for a flush rim with a silencing function. The water replenishing device has independent drainage from the drainage of the cistern. The water replenishing device includes a water storage box with a water inlet on a top side and a drainage outlet on a bottom side. The drainage outlet is connected to the waterway for the flush rim. A lid is installed in the water storage box to open or close the drainage outlet. The water storage box is provided with a water storage area. A backflow channel has one end connected to the water inlet and the other end extending into the water storage area below or equal to the highest level of the water storage area. Such toilets make less noise by eliminating water inlet noise.

A toilet device includes a case and a deodorizing device. The deodorizing device includes a first opening part, a second opening part, a third opening part, a suction fan, a first deodorizing path part, and a second deodorizing path part. The first opening part is configured to suction air outside the case. The second opening part is configured to suction air inside the case. The third opening part is configured to exhaust out of the case air suctioned by the first and second openings. The suction fan is configured to suction the air outside and inside the case through the first and second opening parts. The first deodorizing path part connects the suction fan with the first and second opening parts. The second deodorizing path part connects the suction fan and the third opening part. The second opening part has a smaller opening area than the first opening part.

A toilet pan is provided with a water replenishing device for flush rim with silence function. The water replenishing device has independent drainage from the drainage of the cisterns. The water replenishing device includes a water storage box with a water inlet on top side and a drainage outlet on bottom side. The drainage outlet is connected to the waterway for flush rim. A lid is installed in the water storage box to open or close the drainage outlet. The water storage box is provided with a water storage area. A back flow channel has one end connected to the water inlet and the other end extending into the water storage area below or equal to the highest level of the water storage area. Such toilet makes less noise by eliminating water inlet noise.

A toilet and a waste discharge device thereof, where the waste discharge includes a pipeline assembly and a switching assembly. The pipeline assembly includes a water seal pipeline and a waste discharge pipeline. The waste discharge device has a waste discharge state and a water seal state. In the waste discharge state, the waste discharge pipeline is configured for toilet waste discharge. In the water seal state, the water seal pipeline is configured to water-seal the toilet. The switching assembly is configured to be capable of controlling the waste discharge device to switch between the waste discharge state and the water seal state.

A pressure-assisted flush water tank includes a fluid container, a Venturi nozzle, a baffle and a buoy. The fluid container has an accommodating chamber, a water channel and an air channel. The accommodating chamber has a fluid inlet. The water channel and the air channel are in communication with the fluid inlet. The Venturi nozzle is disposed at a junction of the water channel and the fluid inlet. The baffle is configured to seal the air inlet in a movable manner. The buoy is disposed on an inner side of the air inlet. The top end of the buoy leans against the baffle. The buoy rises under internal pressure of the fluid container until the air inlet is closed. Before the buoy closes the air inlet, the protruding post abuts against and lifts up the baffle to open the air inlet.

A toilet assembly may comprise a toilet tank to hold flush water, a flush valve assembly positioned in the toilet tank, a toilet deck, a toilet bowl, a trapway in flow communication with the toilet bowl, a container positioned in the toilet tank, and a connecting tube extending from an interior of the container to the trapway. A first gasket positioned between the toilet tank and the toilet deck may form a seal around the flush valve assembly. A second gasket positioned between the toilet tank and the toilet deck may form a seal around the connecting tube. The first gasket may comprise a recess for receiving the flush valve assembly and a protrusion extending into the toilet deck.