The Rinnai 104000011-K is a genuine Flame Rod Electrode Kit for Rinnai tankless water heaters (confirm by model). Flame sensing rod kit. Replace when the heater lights and then shuts down on a flame fault.
This is an OEM Rinnai part, so it fits and performs the way the original did. Confirm your model before ordering; the model is on the rating label on the unit. If you are not sure which part you need, Rural Energy support can check it against your model and serial number.
Rural Energy is a Rinnai distributor and keeps Rinnai tankless water heater parts and venting in stock for fast shipping to dealers, contractors, and homeowners.