A shut-off valve that has a closure orifice, a closure member to open and close a gas passage through the shut-off valve, an electromagnetic actuator including a movable assembly attached to the closure member, the closure member, and an electromagnetic filed generator magnetically associated with the movable assembly. The shut-off valve also includes a manual actuator for acting on the movable assembly, the manual actuator comprising an open position in which it is decoupled from the movable assembly, the electromagnetic actuator thus being able to act on the closure member to cause its closure.

A leak detection and prevention system includes a gear motor linkage assembly. The gear motor linkage assembly includes a gear motor and a gear motor controller/driver module that controls operation of the gear motor. The gear motor linkage assembly also includes a push lever attached to a shaft of the gear motor, the push lever in a home position, wherein when a signal indicating that a leak has been detected is received the gear motor controller/driver module controls the gear motor to rotate the push lever so that the push level non-captively engages a handle of a valve and pushes the handle to a closed position, then the gear motor controller/driver module controls the gear motor to rotate the push lever to the home position.

A pressure measuring and flow-rate controlling device includes: a flattening plate including a fluid cavity in the flattening plate; a flexible contact membrane provided on said flattening plate; a support member configured to secure the flattening plate against a sample; a pressure adjuster; an inlet tube connected to the pressure adjuster at a first end of the inlet tube, the inlet tube connected to a first end of the fluid cavity at a second end opposite to the first end of the inlet tube; and an outlet tube connected to a second end opposite of the first end of the fluid cavity, where the pressure adjuster is configured to control a flow rate of a fluid passing through the fluid cavity based on cell pressure of the sample.

A liquid leak detection and prevention device comprised of a leak detection apparatus positioned near a water-dependent appliance to monitor for moisture due to a leak, and a leak prevention system connected to the leak detection apparatus in fluid communication with a water pipe attached to the water-dependent appliance and positioned in-line with the water pipe is disclosed.

A fluid flow control system having a fluid inlet configured to be operatively coupled to a fluid source, a fluid outlet in fluid communication with the fluid inlet such that fluid may exit the system therethrough, a proximity sensor for detecting the position of an object within a region adjacent the sensor, and a flow control device configured to regulate fluid flow between the inlet and outlet in response to object detection by the sensor, wherein the flow control device varies the fluid flow proportional to the detected distance of an object from the sensor. A water flow control system for use in a shower environment is also provided, as well as a shower control system, methods for controlling water flow based on sensing of the presence and location of an object, and methods for reducing water consumption.

In an embodiment of the present invention, a swimming pool water exchange device is provided. In an embodiment, the device fills fresh water, from a water source, into one or more bags as the old water is pumped from the bottom of the pool. In an embodiment, the water exchange device is further provided with a regulation system. In the embodiment, the regulation system cuts off the fresh water supply if the water level exceeds a predetermined height. Furthermore, the regulation system may shut off the pump if the water level drops below a predetermined height.

A liquid leak detection and prevention device comprised of a leak detection apparatus positioned near a water-dependent appliance to monitor for moisture due to a leak, and a leak prevention system connected to the leak detection apparatus in fluid communication with a water pipe attached to the water-dependent appliance and positioned in-line with the water pipe is disclosed.

A liquid leak detection and prevention device comprised of a leak detection apparatus positioned near a water-dependent appliance to monitor for moisture due to a leak, and a leak prevention system connected to the leak detection apparatus in fluid communication with a water pipe attached to the water-dependent appliance and positioned in-line with the water pipe is disclosed.

A liquid leak detection and prevention device comprised of a leak detection apparatus positioned near a water-dependent appliance to monitor for moisture due to a leak, and a leak prevention system connected to the leak detection apparatus in fluid communication with a water pipe attached to the water-dependent appliance and positioned in-line with the water pipe is disclosed.

A water leak detection assembly for sensing and stopping a water leak in a building includes a screw that is inserted into a wall having the screw being positioned proximate a pipe for a plumbing fixture in a building. A sensing unit is provided and the sensing unit is positionable in the screw having the sensing unit being aligned with the pipe. The sensing unit senses moisture thereby facilitating the sensing unit to detect water leaking from the pipe. A shut off unit is provided and the shut off unit is fluidly coupled to a water supply pipe for the building and the shut off unit is in electrical communication with the sensing unit. The shut off unit turns off the water supply pipe when the sensing unit senses water thereby stopping the potential water leak.