A polyethylene pipe service system comprising: a valve including: a disk axially translatable between an open and a closed position; a cylindrical-shaped lower end located below the disk and configured for connection to a saddle branch fitting (F) of a polyethylene pipe (P); a cylindrical-shaped upper end located above the disk; and a polyethylene pipe service machine (30T, 30P, or 30C) including: a cylindrical-shaped lower end ; and a collar having a diameter greater than the cylindrical-shaped lower end of the polyethylene pipe service machine and configured for connection to the cylindrical-shaped upper end of the valve; characterized in that : the cylindrical-shaped upper end of the valve including a first portion (20 or 40) of a cam profile is located on an inner wall of the cylindrical-shaped upper end; and the cylindrical-shaped lower end of the polyethylene pipe service machine including a second portion (40 or 20) of the cam profile is located on an outer wall of the cylindrical-shaped lower end; wherein when the first and second portions of the cam profile engage with one another, rotation of the polyethylene pipe service machine relative to the valve changes a vertical elevation of the polyethylene pipe service machine relative to the valve and connects the machine to the valve. a valve including: a disk axially translatable between an open and a closed position; a cylindrical-shaped lower end located below the disk and configured for connection to a saddle branch fitting (F) of a polyethylene pipe (P); a cylindrical-shaped upper end located above the disk; and a disk axially translatable between an open and a closed position; a cylindrical-shaped lower end located below the disk and configured for connection to a saddle branch fitting (F) of a polyethylene pipe (P); a cylindrical-shaped upper end located above the disk; and a polyethylene pipe service machine (30T, 30P, or 30C) including: a cylindrical-shaped lower end ; and a collar having a diameter greater than the cylindrical-shaped lower end of the polyethylene pipe service machine and configured for connection to the cylindrical-shaped upper end of the valve; a cylindrical-shaped lower end ; and a collar having a diameter greater than the cylindrical-shaped lower end of the polyethylene pipe service machine and configured for connection to the cylindrical-shaped upper end of the valve; characterized in that : the cylindrical-shaped upper end of the valve including a first portion (20 or 40) of a cam profile is located on an inner wall of the cylindrical-shaped upper end; and the cylindrical-shaped lower end of the polyethylene pipe service machine including a second portion (40 or 20) of the cam profile is located on an outer wall of the cylindrical-shaped lower end; the cylindrical-shaped upper end of the valve including a first portion (20 or 40) of a cam profile is located on an inner wall of the cylindrical-shaped upper end; and the cylindrical-shaped lower end of the polyethylene pipe service machine including a second portion (40 or 20) of the cam profile is located on an outer wall of the cylindrical-shaped lower end; wherein when the first and second portions of the cam profile engage with one another, rotation of the polyethylene pipe service machine relative to the valve changes a vertical elevation of the polyethylene pipe service machine relative to the valve and connects the machine to the valve. <EOS>