The washing machine starts to leak while you`re watching TV .... Or the freezer fails and you don`t notice it for a day or two .. Or the children turn on the taps in the bath and leave them running .. In all these cases, and many more, some form of Domestic Early Warning System (DEW line) can prevent more or less serious consequences. What is required is a system that will monitor various vital points throughout the house and give timely warning if anything goes wrong. A very simple alarm line is described here.
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