Patent ID: 7527714
Filing Date: 2009-05-05
Classification: C23F,F24H

Abstract:
1. A tank assembly for holding hot water, comprising: a steel water tank, the water tank having a cylinder portion and a top dome; and an electrically conductive spud of a selected length, the spud having a first end which is attached to the top dome of the water tank and defining an opening into the water tank, wherein the spud extends upwardly from the water tank and terminates in a second end having portions defining external threads; and an anode rod of a selected length extending through the spud into the water tank, the anode rod having a first end and a second end, the anode rod having a steel core and a quantity of sacrificial metal surrounding the steel core; and a steel disk, the steel disk attached to the steel core and centered with respect to the steel core at the first end of the anode rod, the steel disk being electrically connected to the anode rod steel core; and a water sealing gasket which encircling the anode rod, the gasket fitting between the second end of the spud and the steel disk; and an internally threaded electrically conductive nut threadedly engaged with the external threads of the spud, the nut having portions that engage the steel disk and bias the steel disk against the gasket and the second end of the spud.