American Standard 2257.001.020 Afwall Universal Toilet Bowl, White Elongated wall-hung flushometer valve toilet, less seat High efficiency, low consumption operates in the range of 1.1 -Gallons-per-flush to 1.6 -Gallons-per-flush (4.2Lpf to 6.0Lpf) Direct-fed siphon jet flush action Fully glazed 2-1/8-Inch trapway / 2-Inch minimum ballpass 1,000 grams of miso at 1.6 -Gallons-per-flush or 1.28 -Gallons-per-flush when used with an American Standard flush valve