Water hardness affects coffee flavour, limescale buildup and how often your coffee machine needs descaling. Use our UK Water Hardness Checker to find your local water hardness and receive personalised maintenance recommendations.

UK Water Hardness Checker

Enter your postcode to estimate your local water hardness and get a personalised coffee machine care recommendation.

Results are based on local water supply data and may vary slightly within individual properties.

Source: MyTapWater

Hardness Scale

Hardness (mg/L CaCO₃); Coffee Machine Advice Soft (0-100) Descale every 3 - 6 months Moderate (100-200) Descale every 2 - 3 months Hard (200-300) Descale every 1 - 2 months Very Hard (300+) Descale every 2 - 4 weeks

Why Water Hardness Matters

Why does water hardness affect coffee machines?

Hard water contains dissolved minerals such as calcium and magnesium. Over time these minerals form limescale inside boilers, thermoblocks and pipes.

Limescale can cause:

  • Reduced coffee temperature
  • Poor extraction and flavour
  • Slower flow rates
  • Higher energy consumption
  • Shorter machine lifespan

Regular descaling helps maintain performance and consistency.

Signs Your Machine Needs Descaling

Common Signs of Limescale Build-up

  • Coffee tastes weaker or bitter
  • Brewing takes longer than normal
  • Machine becomes noisier
  • Lower coffee temperature
  • Reduced steam performance
  • Descaling warning light appears

Coffee machine maintenance guides

FAQ Section

How do I know if my water is hard?

Most UK homes receive either moderate or hard water. Enter your postcode above to check your local supply

Can hard water damage coffee machines?

Over time, limescale can reduce performance and shorten machine lifespan if not removed regularly.

Do water filters replace descaling?

No. Water filters reduce mineral build-up but do not completely eliminate the need for descaling.

How often should I descale my coffee machine?

This depends on water hardness, usage and machine type. Hard water areas may require descaling every 2 - 8 weeks.

What does mg/L CaCO₃ mean?

This is the standard measurement used to describe water hardness in the UK.

Need Support?

For product support or usage questions, contact the Ventori team

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