K-13517-RF-CP Kohler Manual Toilet Flush Valve 1.28 gpf Retrofit - Chrome Reliable piston technology delivers consistent performance and accurate discharge across a full range of incoming water pressures.Engineered for optimal performance with KOHLER 1.28 gpf toiletReliable piston valve technologyChloramine resistance on all rubber components exposed to waterwayDurable cast brass constructionDoes not include vacuum breaker or control stopThis product can help a building earn Water Efficiency points in the LEED Green Building Rating System. See specification sheet for water use dataComplies with the guidelines of the Americans with Disabilities Act (ADA)Locking stop cap and non-hold open design provide protection against vandalism