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If the water supply line valve is not fully open, not enough water will be in the bowl for effective flushing. The fill valve, found in the toilet water tank, can also cause problems.
But most toilets should be replaced every 25 years. But this isn't because toilets stop working after a certain point—instead, it's because toilet and plumbing efficiency standards change over time.
When the tank fills with water, the air trapped inside compresses. When the air pressure inside the plastic tank reaches a certain level, the tank stops filling with water. A high-pressure valve located in the center of the vessel holds the air and water inside until the user flushes the toilet. [12]
Toward the end of the discharge process, the ballcock responds to the drop in water level and refills the tank. Should the float or valve fail and allow the water level to exceed the fill line, the water will pour into the overflow tube and out to the bowl (in the flapper valve type) or to an outside drain (in the siphon type).
A typical flush toilet is a ceramic bowl (pan) connected on the "up" side to a cistern (tank) that enables rapid filling with water, and on the "down" side to a drain pipe that removes the effluent. When a toilet is flushed, the sewage should flow into a septic tank or into a system connected to a sewage treatment plant.
Image credits: WhooshBulletTime #5. I worked in a souvenir shop at an amusement park. It was the fourth of July, one of the busiest days because of the park's fireworks show.
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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