Fluidmaster 400AKRP10 Complete Toilet Repair Kit – The all-in-one solution to fix a toilet that runs constantly, won't flush properly, leaks between the tank and bowl, makes noise when filling, or has weak flush power. This comprehensive kit includes everything you need to completely rebuild your toilet tank: the industry-leading Fluidmaster 400A Fill Valve (eliminates noisy filling and ensures reliable tank refill), 507A Flush Valve with overflow tube, water-saving 502 Flapper with adjustable dial to customize flush volume, chrome tank lever, solid brass mounting bolts, and universal tank-to-bowl gasket. The 400A fill valve features code-approved anti-siphon technology trusted by toilet manufacturers worldwide. The adjustable flapper lets you fine-tune water usage for 2" flush valves, helping reduce water waste while maintaining flush performance. Solid brass hardware resists corrosion for years of leak-free service. Compatible with most close-coupled toilets from American Standard, Kohler, Eljer, TOTO, and other major brands. Works with both 1.6 GPF and 3.5 GPF toilets. Fast, easy installation gets your toilet running smoothly again — most repairs completed in under an hour with basic tools.