A pipe connector, comprising: a socket body, comprising in the direction of pipe entry: a locking cap for preventing the components in said socket from escaping, a locking cap stop member arranged at the end of said socket body where said pipe enters, for preventing said locking cap from escaping; a demounting ring for unlocking said pipe; a grab ring, comprising a flange, and a plurality of teeth arranged on said flange and fixed to the external wall of said pipe; a retainer, in moveable connection with the internal wall of said socket body, for stopping said grab ring from moving in the direction of pipe entry; a retainer shoulder arranged on the internal wall of said socket body for stopping said retainer from moving in the direction of pipe entry; an 0-shaped sealing ring for forming a sealed connection with the external wall of said pipe; an O-shaped sealing ring shoulder, arranged on the internal wall of said socket body, for stopping said 0-shaped sealing ring from moving in the direction of pipe entry; a pipe stop member, arranged on the internal wall of said socket body, for stopping said pipe from moving in the direction of pipe entry; the arrangement of said retainer shoulder and said locking cap allows free axial movement of said grab ring and said retainer therebetween; characterized in that said flange of said grab ring is deflectable upon entry of a pipe in said socket, and said O-shaped sealing ring is compressible and axially expendable upon directing liquid into said pipe and pressurizing said pipe, thus pushing said retainer so that said grab ring is pushed to move in reverse direction of pipe entry, which forces said flange to recover from deflection, thus locking said pipe. a locking cap for preventing the components in said socket from escaping, a locking cap stop member arranged at the end of said socket body where said pipe enters, for preventing said locking cap from escaping; a demounting ring for unlocking said pipe; a grab ring, comprising a flange, and a plurality of teeth arranged on said flange and fixed to the external wall of said pipe; a retainer, in moveable connection with the internal wall of said socket body, for stopping said grab ring from moving in the direction of pipe entry; a retainer shoulder arranged on the internal wall of said socket body for stopping said retainer from moving in the direction of pipe entry; an 0-shaped sealing ring for forming a sealed connection with the external wall of said pipe; an O-shaped sealing ring shoulder, arranged on the internal wall of said socket body, for stopping said 0-shaped sealing ring from moving in the direction of pipe entry; a pipe stop member, arranged on the internal wall of said socket body, for stopping said pipe from moving in the direction of pipe entry; the arrangement of said retainer shoulder and said locking cap allows free axial movement of said grab ring and said retainer therebetween; characterized in that said flange of said grab ring is deflectable upon entry of a pipe in said socket, and said O-shaped sealing ring is compressible and axially expendable upon directing liquid into said pipe and pressurizing said pipe, thus pushing said retainer so that said grab ring is pushed to move in reverse direction of pipe entry, which forces said flange to recover from deflection, thus locking said pipe.