The electrode in a Rinnai K26i continuous flow water heater does two jobs at once — it generates the spark that ignites the burner, and it monitors the flame afterwards to confirm combustion is taking place safely. It's a small component, but the whole ignition sequence depends on it working correctly.
Made to Rinnai's own specification, this replacement electrode restores reliable spark ignition and accurate flame sensing where the original has worn or become fouled with use. Electrodes are a routine wear item, so it's worth checking the condition of the tip during servicing and replacing it before it starts causing ignition faults rather than after.
⚠ Important: This part should only be installed or serviced by a Gas Safe registered engineer or suitably qualified professional. Always isolate the gas supply and disconnect the electrical power before working on the appliance.
Key Features & Benefits
Genuine Rinnai Part: Made to Rinnai's own specification for a correct fit and reliable operation.
Ignition & Flame Detection: Generates the burner spark and monitors flame presence from the same electrode.
Resolves Ignition Faults: Replacing a worn electrode addresses misfires and failed ignition attempts.
Built for Combustion Chamber Conditions: Designed to withstand the high temperatures it operates in.
Routine Wear Item: Worth checking and replacing as part of scheduled servicing.
Ideal For
Rinnai K26i continuous flow water heaters.
Ignition system repairs.
Routine appliance servicing.
Gas Safe registered engineers and installers.
Common Problems This Part Will Fix
Ignition Failure: Replaces a worn or fouled electrode tip that's no longer producing a reliable spark.
Burner Misfires: Resolves inconsistent ignition caused by electrode wear or a degraded spark gap.
Flame Failure Lockouts: Fixes faults where the electrode is no longer sensing the flame accurately after ignition.
Repeated Fault Codes on Startup: Addresses ignition-related fault codes linked to a deteriorating electrode.
Why Buy This Product?
If your K26i is misfiring, throwing ignition fault codes, or struggling to light reliably, a worn electrode is one of the first things worth checking — and this genuine part puts you back to Rinnai's original spec rather than an approximation of it. Because ignition and flame sensing both run through this one component, replacing it properly addresses both at once instead of leaving one half of the problem unresolved.
Order the Rinnai K26i Replacement Electrode online today.
Specification
Rinnai Replacement K26i Electrode Specification
Manufacturer
Rinnai
Model Compatibility
K26i
Part Number
P26IV-117A
Product Type
Ignition / Flame Detection Electrode
Function
Spark Ignition and Flame Monitoring
Replacement Part
Yes – Genuine Rinnai Component
Installation Requirement
Qualified / Gas Safe Registered Engineer
Application
Water Heater Ignition System Servicing
Features
Rinnai Replacement K26i Electrode Features
Genuine Rinnai Part: Made to Rinnai's own specification for a correct fit and reliable operation.
Ignition & Flame Detection: Generates the burner spark and monitors flame presence from the same electrode.
Resolves Ignition Faults: Replacing a worn electrode addresses misfires and failed ignition attempts.
Built for Combustion Chamber Conditions: Designed to withstand the high temperatures it operates in.
Routine Wear Item: Worth checking and replacing as part of scheduled servicing.
