As Murphy's Law would have it, your plumbing woes always come at the worst of time – when you have visitors coming over in the next couple of days or at odd hours of the day. We understand your frustration and will do our best to sort out your problem and restore your home or building to it's original splendour in no time.
Locate the water isolation valve in your home. If you have a water meter, it is generally located before or after the meter.
Turn the electricity supply to the geyser off. Generally it is marked on your board; if you cannot find it, turn the mains off.
Empty the water heater. After the power and water are isolated from the geyser, ...