The American Standard H2Option® 12 in rough-in toilet tank (tank only) features limited lifetime warranty on vitreous china and five year warranty on all mechanical parts. At American Standard it all begins with our unmatched legacy of quality and innovation that has lasted for more than 130 years. It is this tradition of quality and innovation that puts us in three out of five homes in America, as well as, countless hotels, airports, and stadiums. We provide the style and performance that fit perfectly into life, wherever that may be.