Fluidmaster 400ARHR - PerforMAX High Performance Toilet Valve
Quietest and most powerful fill valve on the market. Works with all toilets, including Kohler, Toto and American Standard. Maximize toilet performance and save water. High Efficiency Toilets HET 1.28 ...
Pros: Relatively easy to install and much quieter than before. Saves water with each flush.
Cons: Pictures on instructions could be bigger and clearer.