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The modern toilet utilises a cistern to reserve and hold the correct amount of water required to flush the toilet bowl. In earlier toilets, the cistern was located high above the toilet bowl and connected to it by a long pipe. It was necessary to pull a hanging chain connected to a release valve located inside the cistern in order to flush the ...
After flushing, the flapper valve in the water tank closes or the flush valve shuts; water lines and valves connected to the water supply refill the toilet tank and bowl. Then the toilet is again ready for use. If the forward ("flush") jet connection to the upper inlet in the toilet clogs, poor or no flushing action may result. [citation needed]
There are also dual-flush toilets that use a siphon valve operated by a lever rather than buttons, with a ≤ 6L full flush, and a ≤ 3L half-flush if the flush handle is held down [8] or released immediately after flushing. [9] Tipping bucket. The tipping bucket cistern can operate in a dual flush mode when the lever is rotated halfway 2.5/5 ...
As the tank water level drops, the float descends and actuates the fill valve. Water is fed to the tank to replenish its supply, and a smaller flow is directed into the overflow tube to refill the bowl. Once the flapper valve closes, the water flow from the fill valve continues until the tank level again reaches the fill line.
These are more specific types of valves, used only in particular fields or applications. Often they are subcategories of the classification by operating principle and by function: Aspin valve: a cone-shaped metal part fitted to the cylinder head of an engine; Ballcock: often used as a water level controller (cistern)
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A sewer pipe is normally at neutral air pressure compared to the surrounding atmosphere.When a column of waste water flows through a pipe, it compresses air ahead of it in the system, creating a positive pressure that must be released so it does not push back on the waste stream and downstream traps, slow drainage, and induce potential clogs.
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