A new heat trap design will be installed on all residential gas and electric water heater models with 3/4-inch NPT top inlet and outlet water connections. They can also be purchased as service parts for installation on older non-heat trap style dip tube and anode rod assemblies. The design incorporates a small disc that reduces heat loss, creates a true dielectric connection on the top water inlet and outlet fittings and reduces noise associated with ball-type style heat traps.