Suburban 520814 SW Series Water Heater Repl. Ignition Board. OE:Suburban 520814. It is used with Suburban water heater SW4D, SW6D, SW6DE, SW6DEL, SW6DEM, SW6DM, SW10D, SW10DE, SW10DEL, SW10DEM, SW10DM, SW12D, SW12DE, SW12DEL, SW12DEM, SW16D, SW16DE, SW16DEL & SW16DEM.