The KOHLER Highline Tall is Kohler’s tallest toilet a full 2-1/2” taller than Comfort Heighttoilets to provide ultimate accessibility and ease of use. With its clean, simple design and efficient performance, this Highline water-conserving two-piece elongated toilet combines both style and function. An innovative 1.28-gallon flush setting provides significant water savings of up to 16,500 gallons per year, compared to an old 3.5-gallon toilet, without sacrificing flushing power.