An indexable cartridge and method that is useable in either a stagnant fluid environment or in a moving fluid environment with the indexable cartridge floatable in a stagnant fluid environment and securable in a moving fluid environment with the indexable cartridge having a housing having one or more diffusion ports and a sleeve having one or more diffusion ports indexable to a diffusion port alignment through resilient yielding of the sleeve while a set of ribs inhibit lateral flow therebetween.

A plumbing component includes a valve provided within a portion of the plumbing component and configured to control the flow of water through the plumbing component. The valve includes a body and at least one waterway within the body. An electric heater extends through at least a portion of the body of the valve and is configured to heat at least a portion of the body to an elevated temperature sufficient to kill organisms within the waterway.

A dispenser system including a source of chemical concentrate, a source of diluent, and a mix chamber in fluid communication with the source of chemical concentrate via a first line and with the source of diluent via a second line to mix chemical concentrate and diluent to form a dilution. The dispenser system also includes one or more metering devices disposed in one or both of the first line and the second line, a discharge fluidly coupled to the mix chamber to deliver the dilution to a downstream receptacle, and a control system in communication with the one or more metering devices. The control system is programmed to adjust a concentration of chemical concentrate in the dilution via control of the one or more metering devices based on an environmental factor affecting a physical environment to be cleaned using the dilution.

Described are a method and an apparatus for delivering a fluid having a desired mass composition. According to the method, temperatures of the fluids to be mixed are sensed and the densities of the fluids at the sensed temperatures are determined. The volume of each fluid is determined so that a mixture of the fluids at the sensed temperatures has the desired mass composition. The determined volumes of the fluids are combined to create the mixture. In one option, combining the determined volumes includes metering flows of the fluids sequentially into a common fluid channel. Alternatively, combining the determined volumes includes controlling a flow rate of each of the fluids and directing the fluids into a common fluid channel.

A shower head having a stem; a spray head coupled to the stem; a mixing valve located within the stem or the spray head, the mixing valve having a first valve member assembly for controlling a first fluid flow to a mixing chamber and a second valve member assembly for controlling a second fluid flow to the mixing chamber. Each valve member assembly includes a spool, a first valve member on the spool that engages with a first valve seat in a closed position and a second valve member on the spool that engages with a second, separate, valve seat in the closed position. An electrically powered first motor is located within the stem or the spray head. The first motor is coupled to the first valve member assembly to control movement of the first valve member assembly to control the flow of the first fluid to the mixing chamber.

A water delivery device that includes a body having a cold water inlet, a hot water inlet, and an outlet; a mixing valve in the body, and a touchscreen user interface on a surface of the body. The mixing valve includes a housing having a mixing chamber that is fluidly connected to the outlet, a first flow control valve moveably disposed in the housing to control a cold water flow from the cold water inlet to the mixing chamber, and a second flow control valve moveably disposed in the housing to control a hot water flow from the hot water inlet to the mixing chamber. The touchscreen user interface allows a user to control a temperature and/or a flow rate of water from the outlet by controlling the first and second flow control valves.

A shower head that includes a movable handset, a mixing valve, and an electric heater. The movable handset includes a stem configured to detachably engage a shower head dock, and a spray head coupled to the stem and configured to discharge water. The mixing valve is disposed within the movable handset and includes a housing including a waterway located therein for water to flow through, a first flow control valve located within the housing and configured to control the flow of hot water to the spray head, and a second flow control valve located within the housing and configured to control the flow of cold water to the spray head. The electric heater is disposed within the movable handset and configured to heat at least part of the housing to an elevated temperature sufficient to kill organisms within the waterway.

Apparatus and methods for providing fluid such as water at a controlled temperature. In some embodiments, hot and cold fluid is provided to a thermostatically controlled mixing valve, which then provides fluid at a mixed temperature to a plumbing system. The thermostat provides a first loop for closed-loop control of fluid exit temperature, and preferably there is a second, electronically controlled closed loop for adjusting the temperature of fluid exiting the valve. In yet other embodiments the electronic control loop is fail-fixed, such that a loss of electrical communication to the actuator results in the actuator maintaining its last position. In yet other embodiments there is a system including a flow sensor and a recirculation pump such that the temperature of the fluid exiting the valve cannot be adjusted if there is insufficient flow, or if the pump is actuated.

During the production of consumable liquids such as milk, soup, and juice, the liquid consumable may be transferred from one location to another location through a fluid conduit. For example, a consumable liquid may be transferred from a storage tank to another destination through piping. At the end of the process, the piping may be purged with a flushing fluid to push the liquid consumable remaining in the piping to the end destination, thus preventing the volume of liquid remaining in the piping from being wasted. To control the flushing processing, fluid flowing through the piping may be fluorometrically analyzed to determine a concentration of product in the fluid. The flushing liquid can then be controlled based on the determined concentration. For example, the supply of flushing liquid may be terminated when the concentration of product falls below a threshold, indicating the flushing liquid is diluting the liquid consumable.

The specification generally discloses systems and methods for mixing and delivering fluids in microfluidic systems. The fluids can contain, in some embodiments reagents that can participate in one or more chemical or biological reactions.