Yes, pouring a large bucket of water quickly down into the toilet bowl will force a complete flush (a method known as a gravity bucket flush). By dumping approximately 1 to 2 gallons of water rapidly from waist height directly into the center of the bowl, the sudden volume and velocity trigger the siphon action, emptying the bowl completely just like a standard handle flush. This is especially useful during utility power outages or when the tank mechanism fails. Verification: Observe that the bowl contents empty rapidly and drain away cleanly into the sewer pipe.
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