A double check valve is provided that includes an in-line inlet check valve and an outlet check valve that cooperate to prevent back flow of fluid through the valve. The check valve also includes at least one vent that allows for fluid trapped within the check valve to drain, thereby preventing freezing of the check valve and hydrant to which it is interconnected. The check valve provided omits many superfluous components and thus is smaller and easier to install than check valves of the prior art.

An automatic water faucet apparatus includes a faucet, a detection unit, a hot water storage tank, a first ultraviolet irradiation unit, a display unit, and a control unit. The hot water storage tank heats water supplied to a water supply channel by using a heater, which is not illustrated, and stores hot water. The hot water storage tank is provided inside the faucet and heats water supplied to a second water supply channel. The first ultraviolet irradiation unit disinfects (sterilizes) the hot water stored in the hot water storage tank by irradiating the hot water with ultraviolet rays. The first ultraviolet irradiation unit includes an ultraviolet lamp disposed inside the hot water storage tank, and irradiation of ultraviolet rays to the hot water stored in the hot water storage tank and stop of the irradiation are controlled by the control unit.

A flood control device for detecting discharge from a release outlet, comprising a receptacle having an upper opening, a bottom, and a drain hole; a first water level sensor configured to be triggered by water reaching a first level; a second water level sensor configured to be triggered by water reaching a second level, wherein the first water level sensor is closer to the bottom of the receptacle than the second water level sensor, wherein triggering the first water level sensor represents a low flow signal, and triggering both the first water level sensor and the second water level sensor represents a high flow signal. The low flow signal can be used to trigger a warning, and the high flow signal can be used to trigger automatic shutoff and/or shutoff alarm.

The present disclosure provides a lower position water suction assembly, including a jet flow element configured to convey water in a water tank and outside tap water together into a bowl part of a toilet. The lower position water suction assembly also includes a lower position water suction pipe connected to the jet flow element and configured to convey the water in a lower portion of the water tank into the jet flow element. The lower position water suction pipe includes a water suction pipe port comprising a plurality of projections configured to contact an inner bottom surface of the water tank and draw the water from the lower portion of the water tank.

A valve assembly with a spring retention assembly including an elongated cylinder portion having an open threaded end and a closed end and an elongated piston portion having a free end and a threaded tab end configured to thread through the open threaded end and, thereby, be slideably captured in the cylinder portion. A spring couples to the body portion and the piston portion to provide a force to urge the body portion and the piston away from one another, wherein the closed end and the free end are similarly shaped so that the spring retention assembly can be reversibly mounted to a valve member that can also be reversibly mounted.

Surface disinfecting and sterilizing devices, systems and methods are provided. Surface disinfecting systems provided include a control system with one or more camera(s) and an aimable, rapid disinfecting and/or sterilizing device(s), all of which may be installed within a public or other high-traffic environment, and configured to monitor and treat all touched surfaces within the environment. The control system determines a cooling time for each such touched surface and type of treatment, and prevents treatment from occurring when treated surface(s) are accessible by human body part(s) or other objects within the environment. The invention may be provided on or in any form of user interface that may be physically touched by a user. For example, in some embodiments, the invention may be provided to treat, disinfect and sterilize door handles, touchscreens, or other user controls, and any other user interfaces bearing a risk of carrying microbes and pathogens.

An automatic water faucet device 1 includes: an electrolysis tank 37 that electrolyzes water to generate electrolyzed water; a second water discharge part 13 for discharging the electrolyzed water, a second flow path 18 that extends from the electrolysis tank 37 to the second water discharge part 13; a second solenoid valve 28 that switches between supply and blocking of normal water with respect to the electrolysis tank 37, and a controller 40 that controls the electrolysis tank 37 and the second solenoid valve 28. The controller 40 energizes the electrolysis tank 37 to discharge the electrolyzed water and thereafter stops the energization of the electrolysis tank 37 and maintains an open state of the second solenoid valve 28, to stop the supply of the electrolyzed water to the second flow path 18 and to supply normal water to the second flow path 18.

A vacuum breaker valve assembly includes valve body defining a hollow main chamber, which communicates with a plenum opening, an inlet opening, and an outlet opening. A valve cap is attached to the valve body and defines a plenum, which communicates with the plenum opening, and a vent opening communicating with atmosphere. A drainage plug is connected to the vent opening, and an overflow conduit defines an elongated flexible hollow tube having one end connected to the drainage plug. A cap fixture is connected to the valve cap and defines a countersunk shallow recess that receives therein a thin label that is adhesively attached to the cap fixture.

An arrangement for managing a liquid medium, such as water, combines a pressure-reducing valve with two backflow prevention valves. Both the pressure-reducing valve and the two backflow prevention valves may be integrated into a common housing, specifically with both backflow prevention valves in an inlet chamber of the housing, wherein the inlet chamber and an outlet chamber of the housing are either fluidly coupled or isolated from one another by the pressure-reducing valve depending on the outlet chamber pressure prevailing in the outlet chamber. In some instances, a manually actuatable shut-off valve may be integrated into the housing. The manually actuatable shut-off valve may selectively keep the pressure-reducing valve in a closed position or allow the automatic opening and closing of the pressure-reducing valve depending on the outlet chamber pressure prevailing in the outlet chamber.

An arrangement for managing a liquid medium, such as water, combines a pressure-reducing valve with two backflow prevention valves. Both the pressure-reducing valve and the two backflow prevention valves may be integrated into a common housing, specifically with both backflow prevention valves in an inlet chamber of the housing, wherein the inlet chamber and an outlet chamber of the housing are either fluidly coupled or isolated from one another by the pressure-reducing valve depending on the outlet chamber pressure prevailing in the outlet chamber. In some instances, a manually actuatable shut-off valve may be integrated into the housing. The manually actuatable shut-off valve may selectively keep the pressure-reducing valve in a closed position or allow the automatic opening and closing of the pressure-reducing valve depending on the outlet chamber pressure prevailing in the outlet chamber.