The domestic water supply to the majority of homes is “hard water”. Hard water is simply a definition used to describe water which has a fairly high concentration of minerals dissolved in it. Calcium and magnesium are the two most important minerals. There is, according to the World Health Organisation, absolutely no health risk associated with hard water. However, it can have an effect on the operating efficiency and useful lifetime of a number of different household appliances.

Mineral deposits can build up in water pipes, heating systems and in domestic appliances. Appliances which use hot water – kettles, steam irons, dishwashers and washing machines are especially susceptible to this. This is due to the fact that heating the water liberates many of the minerals which then reform as “scale”. As well as domestic appliances, the central heating system may be affected.

There are a number of different variables which influence how much scale is generated. The temperature of the water is one of the strongest influencing factors on this process. More scale is produced at higher temperatures. Running dishwashers and washing machines at a lower temperature setting will reduce the amount of scale produced and help to ensure that these appliances continue to operate efficiently and have an extended working life. Using soaps and detergents which have an anti-scaling agent included will also help.

Of course, some appliances such as kettles and irons need to be used at high temperature. Some kettles are available with filters these days, which can prevent some of the minerals getting into the sensitive heating elements. Many irons now come with special anti-scaling traps which collect the scale deposits and allow it to be cleaned by simply flushing it under running water. Other alternatives include cleaning or flushing through using special anti-scale chemicals.

Although there are no health problems associated with a hard water supply, many people will dislike the resulting taste of hot drinks or boiled and steamed food. On the other hand, some people actually prefer the taste of tea that is made using hard water to that made using soft water – it is, in the truest sense of the word, a matter of taste. If you don’t like the taste of your hot drinks and food, then you can make use of a water filter. A simple, but effective, jug filter will work – or you could install an under sink or whole house filter if you prefer.

It’s worth making the effort to combat the effects of hard water, albeit it may seem like something of an inconvenience. As well as improving the operating efficiency of your domestic appliances, it will save you money in the long run by extending their lifespan,

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