02903 2500W WATER HEATER ELEMENT | CAMCO's 2500 W/240 V screw-in foldback type ultra-low watt density water heater elements are better suited for areas with problem water. Ultra LWD and special metal surface (high-performance nickel-chromium stainless steel alloy) reduce chances of lime build-up. They resist dry firing and are ideal for problem water areas and locations with intermittent water supply.