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    Fitting 3 star euro locks

    Hi, I need to replace some euro locks and it seems that there are new fangled "3 star" ones available that are anti-snap (more accurately: the sacrificial front snaps off and leaves the lock inoperable from outside, but still working from inside). Two questions, for any budding locksmiths: 1)...
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    How often should an electric immersion heater turn on/off?

    I've got a vented hot water cylinder with two immersion heaters (economy 7 and boost). I've noticed recently that when heating overnight I can hear the element turning on for only 10 seconds or so before turning off again, repeating this cycle soon after. Last night I noticed it around 5am, so...
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