The flush water tank apparatus of the present invention includes: a clutch mechanism 30 coupling the discharge valve 12 and the discharge valve hydraulic drive unit 14 to pull up the discharge valve, and being disconnected at a predetermined timing to cause the discharge valve to descend; flush water amount selection device capable of selecting from a first and a second amounts of flush water; a float device 26 including a float and a holding mechanism switchable between a holding and a non-holding states in conjunction with movement of the float; and a timing control mechanism controlling a timing of a drain port 10a being blocked; and, when the second amount is selected, causes the second amount of flush water to be discharged by switching the holding mechanism to the non-holding state before a water level in a storage tank drops to a predetermined water level.

A system that monitors toilets for leaks using in-toilet monitors with pressure sensors that are placed underwater in toilet tanks. Monitors can be dropped into tanks without additional wiring or installation; they may be battery powered and may transmit data wirelessly. Data may be analyzed by a server that detects leaks or other malfunctions. Pressure data may be filtered to remove the effect of barometric pressure, to measure the height of water in the tank. The system may learn the flush pressure change pattern for each toilet; pressure changes that do not match this pattern may indicate problems such as leaks. Data may indicate the type of leak, such as an open flapper or a leaking valve. Toilet monitors may measure temperature, and the system may generate alerts when freezing appears imminent. The system may keep flush counts for each toilet to support maintenance and water consumption measurement.

A toilet management system includes a toilet bowl device installed in a toilet room, a management device configured to manage a use situation of the toilet bowl device, and a communication device configured to transmit use situation information related to the use situation of the toilet bowl device to the management device. The management device includes an acquirer configured to acquire the use situation information from the communication device, and an abnormality detector configured to detect an abnormality of the toilet bowl device or a facility or equipment installed inside or around the toilet room when the use situation information acquired by the acquirer matches a predetermined condition.

Systems, methods, and devices relating to urinal, in some examples having a movable portion able to pivot from a generally closed to a generally open position. The urinal may have a drain line engaged with a proximal end of the funnel for conveying urine and rinse water into a sewer line or a toilet bowl and a rinse line coupled with a water supply for rinsing urine therein. The urinal may be movable with the assistance of one or more sensors that may automatically signal other electrical or mechanical components to move one or more portions of the urinal, and may be include elements that seal portions of the urinal when not in use or during cleaning to reduce gas or liquid escaping from the urinal system.

A contaminant type detection system and method, which enable detection of the type of the contaminants contained by wireless signals, before or after the use, by the liquid within the component of the ceramic sanitary ware that provides the connection of the ceramic sanitary ware with the wastewater installation, in other words, within the elbow structure, and which, in case a contaminant other than the expected is encountered, enable to inform the user and/or third parties about the contaminant.

A flush water tank apparatus supplying flush water to a flush toilet by using electrical power generated in the flush water tank apparatus, and a flush toilet apparatus including the flush water tank apparatus are provided. The flush water tank apparatus includes a discharge valve hydraulic drive portion, a discharge control device, an electromagnetic valve, a branching portion causing supplied tap water to flow into the discharge control device and into the water supply valve respectively, and a generator generating electrical power to operate the electromagnetic valve. The generator is provided on a water conduit in a downstream side of the branching portion, and on the water conduit in an upstream side of the water supply valve or in a downstream side of the water supply valve.

A power supply assembly and method for a plumbing fixture includes a control circuit that controls operation of the plumbing fixture, and a wireless power receiving circuit coupled to the control circuit that wirelessly receives energy and provides the energy to the control circuit.

A tankless toilet system includes a tankless toilet and a sensor. The tankless toilet is configured to receive water from a water source. The tankless toilet includes a bowl, a first supply conduit, a rim jet, a sump, a second supply conduit, and a sump. The first supply conduit is configured to receive the water from the water source. The rim jet is fluidly coupled to the first supply conduit and configured to provide the water to the bowl. The sump is configured to receive the water from the bowl. The second supply conduit is configured to receive the water from the water source separate from the first supply conduit. The sump jet is fluidly coupled to the second supply conduit and configured to provide the water to the sump. The sensor is coupled to the tankless toilet.

A light ring assembly for a bathroom fixture. The light ring may illuminate one or more light sources in a predetermined sequence and/or in an overlapping manner to create a pulse of light that traverses the circumference of the light ring. Different patterns, colors, and/or sequences of light may be used to convey messages and signals to owners, maintenance, and/or users.

A system for monitoring flush valves includes a plurality of flush valves arranged in at least one restroom, each flush valve including a communication device configured to transmit flush valve data, and at least one controller arranged in a first flush valve and in communication with each other flush valve. The at least one controller is configured to determine a static pressure within the first flush valve, detect a second pressure within the first flush valve, determine that the second pressure is less than the static pressure, in response to determining that the second pressure is less than the static pressure, compare the second pressure with at least one other pressure associated with at least one other flush valve, and determine that the first flush valve is in need of servicing or replacement based on comparing the second pressure with the at least one other pressure.