The refill tube is a small plastic tube that directs water from the ballcock or fill valve into the overflow tube of a toilet tank after a flush. Its primary purpose is to refill the toilet bowl to the correct water level, ensuring that it is ready for the next flush. The refill tube works in conjunction with the fill valve, starting to release water as soon as the tank begins refilling. Proper installation and positioning of the refill tube, which typically involves securing it above the overflow tube, help maintain the correct water level in the bowl and prevent issues like inadequate flushing or sewer gas escape.
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