Usually about 7 liters
approximately 1-2 litres of water is needed to flush a toilet.
Between 6 and 9 litres depending on the age of your toilet.
The main drain is plugged. You may need to remove the toilet and snake directly down the drain.
The toilet itself is plugged or the pipe from the toilet to the drain is plugged. It may be that the tub and sink have their own drain pipe that may connect to the main away from the toilet drain. Plunge the toilet or sometimes if you fill a 5 gallon bucket with water and pour it into the toilet as fast as it will take it, that will flush out the line. It is a greater amount of water all at once an forces out what the clog is.
* In the US approximately 40% of all domestic water consumed is flushed down the toilet. * an old-style single flush toilet can use up to 5.5 gallons (20 liters) of water in one flush, whereas more water efficient dual flush toilets average less than 1 gallon (4 liters) * replacing a traditional single flush toilet with a water efficient dual flush toilet saves about 21 gallons (80 liters) per person per day.
Dual flush toilets usually use 3 and 6 liters of water depending on which way you push the flush handle - 3 liters for a little job and 6 liters for a major event. Single low-flush toilets use either 4.5 liters or 6 liters.
A new dual flush cistern will use 3 liters for a small flush and 6 liters for a large flush. Older cisterns will use more, sometimes as much as 20 liters. If you have a large cistern you can save water by putting a plastic bottle full of water into it.
The toilet and the sink both drain into the grey water waste lines. Because they are connected by piping, sound can travel through the pipes from the toilet to the sink.
pull the toilet. Make sure the trap is clear on the toilet, and then snake the toilet line.