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.
Hard water supply can lead to a build up of mineral deposits, sometimes known as “scale”, in heating systems, water pipes and a variety of small household appliances. Household equipment which uses hot or boiling water, steam irons, kettles, washing machines, coffee makers, dishwashers, etc. – are especially prone to this. This is a result of the fact that heating hard water releases many of the minerals which then reform as scale. Central heating systems and hot water boilers may also 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.
Whilst it may seem like a bit of an inconvenience, it’s well worth taking a little effort to combat the effects of a hard water supply. Apart from improved efficiency of domestic appliances, using the right detergents, operating at a lower water temperature and occasional cleaning will save you money and extend the life of your household goods.
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