Which type of toilet mechanism uses gravity to fill the tank?

The gravity-fed mechanism is designed to rely on the force of gravity to fill the toilet tank. In this system, water from the plumbing supply line enters the tank through an inlet valve when the tank is emptied after a flush. The mechanism is straightforward: as the water flows in, it fills the tank to a predetermined level, at which point a float valve stops the inflow. When the toilet is flushed, gravity allows the water in the tank to flow down into the bowl, creating the suction needed to clear waste effectively.

This type of mechanism is widely used due to its simplicity and reliability. It is less complex than other systems, such as pressure-assisted or vacuum-assisted mechanisms, which rely on additional systems to operate. The gravity-fed design is also generally easier to maintain, making it a common choice in residential plumbing.