Abstract: An embodiment of a fluid valve includes a receptacle, cavity, mixer, and valve assembly. The receptacle has a protrusion configured to engage a groove of a valve-opening-and-fluid-dispensing device, and the cavity has a front end in communication with the receptacle and has a rear end. The mixer has hot and cold input ports and has an output port in communication with the rear end of the cavity. And the valve assembly is disposed in the cavity, configured to allow fluid to flow from the output port through the cavity in response to a valve-opening-and-fluid-dispensing device being disposed in the receptacle, and configured to prohibit fluid from flowing from the output port through the cavity in response to the valve-opening-and-fluid-dispensing device being absent from the receptacle. The valve may include a pressure-relief assembly and/or a unidirectional-valve assembly configured to relieve back pressure during insertion of the valve-opening-and-fluid-dispensing device into the receptacle.

Abstract: An embodiment of a valve, such as a water valve, includes a body, a sleeve, and a rod. The body includes a body cavity, and the sleeve is removably disposable within the body cavity and includes a sleeve cavity. And the rod is movably disposable within the sleeve cavity and is configured to form a fluid-tight seal between the body cavity and the sleeve cavity while the rod is in a closed position and is configured to allow a fluid to flow from the body cavity to the sleeve cavity while the rod is in an open position. Furthermore, one or more components of the valve each can be made partially or fully from one or more polymers.