Heating Element with Gasket The WH1A-S is a screw in heating element that is 1250w at 120v designed to quickly and efficiently heat the water via electricity in a Raritan water heater. These elements must be installed, and the tank filled prior to applying any power or they will burn out. Raritan does offer an element that can last a bit longer if power is applied without water in the tank. Features: * Includes Gasket * Screw-In Type * 120v