OEM Part Number: 9003542. New 4pcs 44 44 24mm Sink Cap Plug Tap Hole Cover 28-40mm Kitchen Part. Efficient ignition and stable combustion: The optimized ignition system and stable combustion design ensure that the water heater can quickly and reliably ignite the gas, and maintain a stable combustion state, improve the hot water heating efficiency, reduce energy consumption, and bring users a more comfortable and energy-saving hot water use experience.