Rinnai Tankless Water Heater || DIY Flush Maintenance

Rinnai Tankless Water Heater || DIY Flush Maintenance
To perform a DIY flush maintenance on a Rinnai tankless water heater, follow these general steps:
Turn off power and gas to the unit.
Shut off the cold water supply.
Drain the water heater by connecting a hose to the drain valve.
Close hot water outlet and cold water inlet valves to isolate the unit.
Optionally, connect a flushing kit like a submersible pump.
Prepare a descaling solution using Rinnai descaling solution or white vinegar.
Open hot water outlet valve slightly and circulate the descaling solution for 45 minutes to an hour.
Drain the descaling solution, rinse the unit with clean water, and close valves.
Restore power, check for leaks, and monitor the water heater for normal operation.
Refer to your specific model's manual for accurate instructions and safety guidelines. If uncertain, seek professional help. Regular flushing helps maintain efficiency and extend the lifespan of the tankless water heater.
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Submersible water pump
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2 pack water hoses
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Distilled white vinegar
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