Why does my water have a TCP or metallic taste?

There are several possible causes of unusual tastes or odours in water.

TCP tastes can occur when the internal stop tap has been operated to carry out any work.

It can occur if the tap is operated after many years of not being used.

Washers can start to degrade over time and cause a TCP like taste and odour.

However this usually only applies to properties where the internal stop tap is more than a few years old and is seldom, or never used.

TCP like compounds are formed when the chlorine reacts with plastic or rubber.  

This sometimes means that the TCP taste is more noticeable when the chlorine level is highest.  Chlorine is added to water continually, however, a demand for water can mean that it may sometimes have a higher level of chlorine in it, for example, early in the morning or early evening.

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