Compared to a 30 year old toilet? An amazing amount (I just installed two such toilets, replacing 30-year-old models). These are dual flush, and in the low flush mode - perfectly adequate for 70% of flushes - they use 1.3 gallons. The old toilets used almost 4 gallons per flush. A saving of 2.7 gallons per flush, times (how many??) flushes per day, times 365: You are easily talking thousands of gallons a year.
There are many sites online that instruct users on how to use a dual flush toilet. To be more specific, one of the most trusted sites that offers dual flush toilet tutorials is Youtube.
the toilet
The dual flush toilet was invented by Australian Bruce Thompson of the Caroma plastics company in 1980. But didn't look like the traditional toilet so they redesigned it to look like a classic toilet.
It depends on what type of flush you use. Old style single flush toilets use around 11 litres of water per flush, older dual flush toilets use 4.5 or 9 litres per flush, while modern water efficient dual flush toilets use 3 or 6 litres per flush.
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.
If you do not have a dual flush toilet, put a brick in the cistern
A defective flush valve causes the leak in toilets. A flush valve is a flap or ball plunger device that is supposed to act as a stopper in the bottom of the toilet tank. So to fix your toilet and save water, get any professional plumber to repair the valve or complete replacement kit . alliedallcityinc.com
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None. It is the same as a normal toilet, 3" or 4" drain.
It depends how big your cistern is. Modern dual-flush toilets have a minimum flush of 6 liters. There are 1000 milliliters in one liter, so the flush would contain 6000 ml.
Ask This Old House - 2002 Attracting Different Bird Species Dual-flush Toilet Valves 8-24 was released on: USA: March 2010
Generally, modern toilets are required to be low flow, which is 1.6 gallons (6L) per flush. Older toilets were 3 gpf (11L). Modern toilets vary in the amount of water required to flush them, from 6L to 3L. Some have a dual flush system allowing solids (faeces) to be flushed with a full volume flush, say of 6 or 4.5L, and liquids (urine) to be flushed with a smaller volume flush of about 3L. It is not possible to flush properly a toilet with less water than that with which it was designed to be flushed. Low volume flush toilets have been designed to work efficiently with a smaller volume of water.