1.6 gpf meets U. S. federal standard for water conservationKit includes diaphragm repair kit handle repair kit vacuum breaker repair kit and tailpiece O-ringQuiet GO BLUE dual-seal diaphragm with a clog-resistant bypass extends lifespan and lowers maintenance costsGO BLUE parts stand up to chloramine and other chemicals lasting 10x longer than competitors' and keeping maintenance costs to a minimumFor use with AquaFlush flush valves; Interchangeable with other manufacturers flush valves