Abstract: Apparatus for disinfecting water flowing through a water system including a water pipe includes a water bypass line having an inlet and outlet communicating with the water pipe. A wye connector is positioned in the water bypass line and includes a closed interior chamber which receives water from the water bypass line and promotes water turbulence. Electrode elements project into the chamber which are electrically connected to a power supply which imparts electrical energy to the electrode elements and causes the release of ions from the electrode elements into the turbulent water within the wye chamber.