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Old and worn out rubber valve seals in a toilet tank can lead to significant leaks causing the toilet to refill constantly. Some leaky toilets may produce a running water sound that is easy to hear. Other toilet leaks can be silent and intermittent leaving toilets to leak for a long period of time before being detected.
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.
Backflow is a term in plumbing for an unwanted flow of water in the reverse direction. [1] It can be a serious health risk for the contamination of potable water supplies with foul water. In the most obvious case, a toilet flush cistern and its water supply must be isolated from the toilet bowl.
While a Siphon valve is related to the operation of a flush toilet, it has little else to do with a ballcock. It's function is to allow water out of the storage tank, not to allow water in like the ballcock or fill valve. This section doesn't belong in this article and should be removed.
The visible water surface in a toilet is the top of the trap's water seal. Each fixture drain, with exceptions, must be vented so that negative air pressure in the drain cannot siphon the trap dry, to prevent positive air pressure in the sewer from forcing gases past the water seal, and to prevent explosive sewer gas buildup.
A flush toilet (also known as a flushing toilet, water closet (WC); see also toilet names) is a toilet that disposes of human waste (i.e., urine and feces) by collecting it in a bowl and then using the force of water to channel it ("flush" it) through a drainpipe to another location for treatment, either nearby or at a communal facility.