Thermostatic taps and showers contain an automatic adjuster which maintains temperature by adjusting the flow of each supply. Should, for example, the water begin to get colder, the thermostatic tap or shower will automatically close down the flow of cold water a little to compensate. This is particularly useful in guarding against the possibility of scalding.
For example, if a WC is flushed while the shower is in use, a drop in cold supply to the shower will occur. The result without thermostatic control would be that the temperature of water at the shower would suddenly rise. With a thermostatic shower, however, the flow of hot water will immediately be closed down sufficiently to compensate.
For more thermostatic shower valves, see of full range of showers, shower valves, triple shower vales, shower panels and more.
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