Final answer:
2) Flush valve. A flush valve is a device located at the bottom of the tank for flushing water closets and similar fixtures. It controls the flow of water from the tank into the toilet bowl.
Step-by-step explanation:
The correct device located at the bottom of the tank for flushing water closets and similar fixtures is a flush valve. A flush valve is a mechanism that controls the flow of water from the tank into the toilet bowl. When the flush valve is opened, water rushes out of the tank and into the bowl, creating the flushing action.
This mechanism consists of a rubber or silicone flapper or a canister that seals the opening between the tank and the bowl. When the trip lever is activated, it lifts the flapper or canister, allowing water to flow out of the tank and into the bowl, effectively flushing away the contents.
Unlike a float valve, which is responsible for regulating the water level in the tank, a flush valve is specifically designed for the purpose of flushing water closets and similar fixtures.