The Rinnai 104000023 Water Heater Electrode Kit restores proper ignition performance in compatible tankless water heaters by providing the components required for reliable burner operation. This replacement kit includes electrodes that generate and monitor the ignition spark needed to light the burner during each heating cycle. It operates by producing a controlled electrical spark an... https://www.hnkparts.com/104000023-rennai-kit-electrode-kt