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plumbing:faq:faq36 2009/04/18 01:35 |
plumbing:faq:faq36 2009/10/05 22:23 current |
| | IN the news - again.\\ | | IN the news - again.\\ |
| | If the thermostat in a hot water cylinder fails, the cistern (tank) in the loft can soften and dump 250kg of near boiling water through the ceiling. This has caused death several times in the last few years.\\ | | If the thermostat in a hot water cylinder fails, the cistern (tank) in the loft can soften and dump 250kg of near boiling water through the ceiling. This has caused death several times in the last few years.\\ |
| - | This is how it happens:\\ | + | This is how it happens: ©ChrisR\\ |
| | [img]http://i30.photobucket.com/albums/c321/ChrisPlumber/Tankofboilingwater.gif[/img]\\ | | [img]http://i30.photobucket.com/albums/c321/ChrisPlumber/Tankofboilingwater.gif[/img]\\ |
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| | New design thermostats were introduced in 2004. If you haven't changed the immersion heater or its thermostat since then, you will have the old type. When those fail, they fail "on" which means there's nothing to stop the water boiling. \\ | | New design thermostats were introduced in 2004. If you haven't changed the immersion heater or its thermostat since then, you will have the old type. When those fail, they fail "on" which means there's nothing to stop the water boiling. \\ |
| | The post 2004 thermostats have an extra safety thermostat built-in, which switches off if the temperature of the water gets above the normal range. It does NOT reset itself when the water cools.\\ | | The post 2004 thermostats have an extra safety thermostat built-in, which switches off if the temperature of the water gets above the normal range. It does NOT reset itself when the water cools.\\ |
