Heating Element w/Gasket – Bolt-On Type – 120vThe WH1A-S is a screw in heating element that is 1250w at 120a 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. Manufacturer : Raritan Manufacturer Part No : WH1A UPC : 085462011252