Tankless water heaters should be flushed and descaled once a year—or every 6 months in areas with hard water—to keep them operating efficiently and to prevent damage.
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🔧 Why You Need to Flush and Descale a Tankless Water Heater:
1. Remove Mineral Scale Buildup:
Hard water contains calcium and magnesium, which form scale inside the heat exchanger. This buildup restricts water flow and reduces heating efficiency.
2. Protect the Heat Exchanger:
Excessive scale acts like insulation, forcing the heater to work harder and increasing the risk of overheating or premature failure.
3. Maintain Efficiency:
A clean heat exchanger heats water quickly and efficiently, saving on energy bills.
4. Prevent Error Codes & Damage:
Scale can trigger warning codes, reduce water pressure, and eventually damage components if left untreated.
5. Extend System Life:
Routine flushing helps preserve the system’s internal parts, keeping your tankless unit running smoothly for 15–20 years or more.
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🧪 How We Flush and Descale (Brief Overview):
• Turn off power/gas and cold water supply.
• Connect a flush pump and hoses to the service valves.
• Circulate a descaling solution (often vinegar or a commercial cleaner) for 45–60 minutes.
• Rinse thoroughly with clean water before restoring the system.
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🗓️ How Often:
• Annually for most homes.
• Every 6 months if you have hard water and no water softener.
Regular flushing protects your investment, maintains performance, and avoids costly repairs down the line.