Abstract: A hot water supply system includes a water supply pipe for supplying cold water, a hot water supply pipe for supplying hot water heated by a hot water supply device, a drain pipe for draining waste water, a heat exchange device for heating cold water supplied from the water supply pipe using the waste water, and a flow rate control mechanism for controlling, when supplying warm water obtained by mixing cold water heated by the heat exchange device and hot water heated by the hot water supply device, the flow rate of the cold water and the flow rate of the hot water so as to maintain the temperature of the warm water.

Abstract: An operating device includes a device main body, and an operating body operated by a user. The operating body is movable between a first position and a second position and enables activation of a water-related appliance by moving from the first position to the second position. The device main body includes a marker part that is different in outer surface color from a neighboring area of the device main body. When the operating body is placed at the first position, the operating body hides the marker part from the outside, and, when the operating body is placed at the second position, the operating body exposes at least part of the marker part to the outside.

Abstract: Provided are valve devices that can be formed compactly. A valve device includes a primary-side valve element including a planar part and a secondary-side valve element connected to the primary-side valve element to be slidable to the planar part of the primary-side valve element, in which a water discharge state can be switched by sliding the primary-side valve element or the secondary-side valve element. The secondary-side valve element includes a packing member that contacts the planar part of the primary-side valve element. The primary-side valve element can include a disk member including the planar part, and the disk member is made from metal.

Abstract: A toilet system having a toilet device with a toilet seat and electricity-using equipment such as an electronic component unit; a power supplying device that is disposed behind a wall and that has a power supply coil by which power is supplied; and a power receiving device that has a power receiving coil built into the toilet seat, that has a resonance frequency with respect to the power supplying device set, and that supplies power received from the power supplying device by way of magnetic resonance to the electricity-using equipment such as the electronic component unit.

Abstract: A faucet device includes a hot water/water mixing valve, a water purification cartridge, a primary side flow path that supplies water to the hot water/water mixing valve and the water purification cartridge, and a secondary side flow path that discharges mixed water flowing out from the hot water/water mixing valve and purified water flowing out from the water purification cartridge to a water discharge port. The primary side flow path and the secondary side flow path are disposed between the hot water/water mixing valve and the water purification cartridge.

Abstract: Provided is a gasket capable of reducing the risk of water leakage from a sealing member for use to join a ceramic member. The gasket is made of elastic material and usable for joining two members which form a flow passage for liquid, and at least one of which is a ceramic member. The gasket includes: a base having a loop shape; a protrusion standing on the base, extending along the loop shape, and protruding toward one of the members; and a retainer formed on an inner periphery of the base and protruding from the inner periphery in an inward direction with respect to the loop shape.

Abstract: A toilet device with which a detergent tank and a pipe member connection part of a pipe member supplying a detergent to a toilet can be connected to each other without a movement of the detergent tank includes a detergent tank including a detergent tank discharge opening and a pipe member connection part connecting the detergent tank and a pipe member having a detergent supply path through which a detergent is supplied to a toilet portion after the detergent is supplied from the detergent tank to each other by being connected to the detergent tank discharge opening, in which the pipe member connection part constitutes a sliding structure advancing and retreating with respect to the detergent tank.

Abstract: Provided are (1) a hydrophilic treatment coating composition containing a compound that contains a radical reactive functional group and a sulfonic acid alkali metal salt group, a radical polymerization initiator, and a polar compatibilizer, (2) a hydrophilic treatment coating composition containing a silane coupling agent that contains a radical reactive functional group, a compound that contains a radical reactive functional group and a sulfonic acid alkali metal salt group, a radical polymerization initiator, and a polar compatibilizer, (3) a hydrophilic treatment coating composition containing a compound that contains a functional group that reacts with a reactive functional group of a silane coupling agent in a surface layer, and a sulfonic acid (alkali metal salt) group, and a polar compatibilizer, and (4) a hydrophilic treatment coating composition containing a silane coupling agent that contains a reactive functional group, a compound that contains a functional group that reacts with the reactive func

Abstract: A flush toilet includes a toilet bowl part structured to have a bowl-like waste receiving surface, a rim part structured to form an upper end side portion of the toilet bowl part, and a water discharge part structured to discharge flush water into the toilet bowl part to form a swirling flow, wherein one surface part out of a front surface part and a rear surface part of the toilet bowl part is provided with one end part of a front-rear direction of the toilet bowl part, and the flush toilet further comprises an upper guide part structured to be provided on a flush water path from the water discharge part to the one end part and guide at least a part of the flush water upward.

Abstract: The purpose of the present invention is to provide an antibacterial/antiviral coating agent capable of forming an antibacterial/antiviral coating film that can maintain an excellent appearance. This antibacterial/antiviral coating agent includes acrylic melamine paint, a quaternary ammonium salt, polyvalent carboxylic acid, and phosphoric acid; the quaternary ammonium salt is included at over 3.0 parts by weight and under 5.0 parts by weight to 100 parts by weight of acrylic melamine paint solids, and the phosphoric acid is included at a mole ratio of 0.5-3.5 to the quaternary ammonium salt.

Abstract: Provided is a toilet system that can provide more detailed information about a use state of a toilet. The toilet system includes: a detection unit (a door lock sensor, a seating sensor, a rotation sensor, a toilet washing switch, etc.) which detects a situation inside a toilet stall; and a control unit which determines, based on a detection result of the detection unit, that the toilet stall is in a vacant state or in an used state, and further makes at least one of a determination that the toilet stall in the used state is in a state immediately after a start of use and a determination that the toilet stall in the used state is in a state immediately before an end of use, and outputs a signal including determination results.

Abstract: A flush toilet is provided with a toilet main unit and a functional unit. The toilet main unit has a toilet bowl and an upper surface portion on which a recessed portion is formed. The functional unit is provided on the rear side of the toilet bowl and offers a function different from a function for washing the toilet bowl. The functional unit is able to move between an entering position where at least a portion of the functional unit is located inside the recessed portion and a retreating position where the entire functional unit is located outside the recessed portion.