02923 4500W WATER HEATER ELEMENT | CAMCO's 4500 W/240 V screw-in foldback type ultra-low watt density water heater elements are better suited for areas with problem water. The ultra LWD of this element helps prevent lime deposits and the high-performance nickel-chromium stainless steel alloy sheath gives it additional strength to resist dry firing. The combined effect make the element better suited for use in areas with problem or intermittent water supply.