| There are a variety of toilet-types and models | | | | the bowl allowing for more efficient flushing and |
| available in the market today. This includes old types, | | | | water flow control. |
| wall-tank models, conventional reservoir tank toilets, | | | | A flush valve toilet like the rear flush toilet or the |
| back flush and rear flush toilets, water saving toilets, | | | | back flush toilet heavily relies on water pressure |
| and many others. | | | | without the use of the usual toilet tank. This type of |
| All of these toilets, regardless of the type or style, | | | | toilet has been used since the 1920's with nothing |
| function to receive and dispose human wastes in a | | | | much of its concept changed. |
| sanitary way. In the old days, chamber pots and | | | | The rear flush WC sends waste out of the bowl |
| outhouses were used to such task, which were | | | | towards the rear of the toilet where it passes |
| proven to be very inconvenient. In the late 1800's, | | | | through a waste line in the house or building rather |
| modern toilets were introduced including the | | | | than in the floor. Alternatively, there are also |
| modern-flush toilets. | | | | back-flush toilets that use reservoir tanks depending |
| This revolutionized human waste disposal system | | | | on the need or special situations. |
| where waste is flushed out by water into a private | | | | There are some cultural variations as to how these |
| septic tank. In 1890, early flush WCs or water closets | | | | WCs are made. In Germany and some parts of |
| made use of wooden reservoir tanks mounted highly | | | | Europe, a toilet bowl that allows human waste to |
| on the wall. The wall-mounted tank provided enough | | | | rest on a ledge before flushing away is not |
| pressure for the water to flow in order to | | | | uncommon. It is typically made or manufactured in |
| adequately clean and empty the toilet bowl from | | | | reverse to most toilet types used in Western |
| waste. Nowadays, this system has been significantly | | | | countries. With this, the sewer outlet is found |
| improved. Modern toilets now have tanks attached to | | | | towards the front of the bowl not at the rear. |