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P 5.04 – Recap and Glossary


  • Water has the potential to cause scale and/or corrosion of brewing equipment.
  • Cafe water needs to be carefully monitored to ensure it is balanced between too soft and too hard.
  • It is possible to use a Langelier Saturation Index calculator to ascertain if you water is balanced.
  • To maintain good water, it is necessary to perform regular tests for general hardness (GH), and carbonate hardness (KH), potential of Hydrogen (pH) and total dissolved solids TDS.
  • Limescale, is not as thermally conductive as copper or aluminium; scale buildup has the effect of encasing heating elements in an insulating layer.
  • Some authorities require pressurised equipment to undergo regular pressure testing.