Millions of people in the UK receive hard water through the mains water supply with London having particularly large areas with hard water. This hard water can effect the efficiency of your Instant Hot Water Tap. When hard water is left to stand, minerals such as calcium and magnesium can solidify and build up to form limescale reducing the life of your tank and tap.

How is hard water measured?

Hard water is measured in parts per million (PPM) and how many particles of hardness are dissolved in the water per million particles gives a rating. This rating has been developed over time to the following categories:

0 – 100 PPM Soft Water

101 – 200 PPM Moderate Water

201 – 350 PPM Hard Water

For customers living in hard water areas, we recommend that you purchase one of our taps with an Enhanced Ion Exchange Filter. This will ensure the longevity of your Hot Water Tank and also that you still have great tasting drinks.