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A flapper is a disc-like rubber or rubber composite component used in toilets to control the release of water from the tank into the bowl during a flush. It sits at the base of the tank, covering the flush valve opening, and is attached to the handle lever by a chain or lift wire. When the toilet is flushed, the handle lifts the flapper, allowing water to flow into the bowl. After the flush, the flapper falls back into place, sealing the valve and allowing the tank to refill. Over time, flappers can wear out, lose their shape, or become misaligned, leading to water leaks or inefficient flushing. Replacing the flapper is a common maintenance task to prevent water wastage and ensure proper toilet operation. Flappers come in various sizes and materials, such as chlorine-resistant rubber, to match different toilet models and water conditions.

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