Single-control mixing cock with plates made of hard material

A single-control mixing cock for regulating the delivery flow rate and the proportional admixing of hot and cold water comprising a cock body including a wall defining a chamber, first and second port means for introducing hot and cold water respectively into said chamber and third port means for discharging water from said chamber, a unitized replaceable bodily insertable and removable cartridge housed within said chamber, valve means within said cartridge for regulating the delivery flow rate and the proportional admixing of hot and cold water between said first and second port means and said third port means, a cap, means for removably securing said cap to said cock body, a control member for manually operating said valve means, means for mounting said control member upon and for articulate motion relative to said cap, aperture means in said cartridge for gaining access to said valve means, means for coupling said control member to said valve means through said aperture means whereby movement of the control member moves said valve means, and said articulate mounting means being further effective for connecting said control member to said cap for the unitized removal of said cap, control member and at least a portion of said coupling means passing through said aperture means upon the operation of said removable securing means without destroying the unitized nature of said cartridge whereby upon the unitized bodily removal of said control member, said coupling means portion and said cap from said cock body said unitized cartridge and valve means therein can be likewise bodily withdrawn from said chamber.