Family members should know the location of shut-off valves of all water system in the house in case Plumbing emergencies occurs. In that case, anyone can immediately stop the water flow while waiting for the Plumber to come to rescue.
Surely, you can count on a 24 your (or perhaps our) 24Hour Emergency Plumber in your area like the one in Rushcutters Bay, where reliable and trustworthy professionals can come to your aide any time of the day. While you can be sure to have your Plumbing concern getting fix within reasonable time, it is best to make temporary repairs yourself to stop leaks, or any system malfunction.
Leaks and faucet malfunction is easier to attend, you just have to stop the water flow by shutting off the main valve. As for clogged drains and toilet, try removing the obstruction using a rubber plunger. If it does not work, do not use other tools that can only damage expensive fixtures, contact your local Plumber immediately to make necessary action and advance solution.