PRODUCT DESCRIPTION The Cadet Pro 1.28 GPF Single Flush Toilet Tank Only from American Standard provides powerful flushing action when paired with coordinating bowl (sold separately). This toilet tank uses just 1.28 gallons per flush to conserve water without sacrificing performance. We recommend pairing this tank with a Cadet Pro bowl. FROM THE MANUFACTURER American Standard Toilet Water Tank - Cadet Pro 12 Inch R Tank White. Collection Name: CADET. SIOP Category: Chinaware Tanks Cadet 3.