straight forward health and safty advice 
Major damage and disruption of work can be caused by burst water pipes, leaking mains, or taps not turned off You must use your initiative to minimise the possible damage - as a guide: where the consequence of closing a valve or tap is unclear, or where there is complex machinery, steam boilers or other plant involved, you must contact the building maintenance engineers for guidance; where it is clear that your action will prevent further damage, you should proceed to turn off valves, etc.; open sink taps that are on the leaking service to drain the water from the pipes to stop the water leaking further. Remember turn off the electrical supply if the water is likely to come into contact with the electric wiring.
Accidents & emergencies