Keep your toilet running leak-free with the Fluidmaster 510K replacement seal. Engineered to fit Kohler AquaPiston and American Standard Champion 3 flush valves, this durable silicone seal stops and prevents leaks that standard rubber seals cannot handle long-term.

• Fits Kohler AquaPiston flush valves
• Fits American Standard Champion 3 flush valves
• Silicone construction lasts 10x longer than standard rubber seals
• Chlorine and hard water resistant for long-term reliability
• Prevents and stops leaks from specialty flush valves
• Simple drop-in replacement - no tools required
• Part number: 510K-001-P10

Tip: Replace your toilet seal at the first sign of a running toilet to avoid water waste and potential tank damage.