It is best to familiarise yourself with your home supply and drainage system. These two must always be two distinct subsystems with no overlapping. One subsystem brings freshwater in and the other takes wastewater out. The water that comes into your home is under pressure. It has enough pressure to allow it to travel upstairs, around corners and everywhere else it is needed. As it enters your home it passes through a meter which registers your water consumption. The main water shut off valve is located close to the meter.
Knowing the technicalities in your home will help once you get plumbing issues. 24 Seven Emergency Plumbing is the number 1 plumbing service in Bexley North that services Arncliffe and surrounding suburbs.