Flush Toilet Piston Replacement Parts C-100500-K Flush Valve Cartridge Assembly, for 500, 501, 501A, 501B, 503, 504 Series & M-101526-F3, M-101526-F4 Tank System Pressure Assist Repair Kit

Reliable Replacement for Flushmate Systems -- Designed to replace C-100500-K flush valve piston assembly. Compatible with Flushmate 500/501/503/504 Series & M-101526-F3/F4 tanks. and pressure-assisted toilet systems (I/II/III/IV) for dependable performance and smooth flushing. Restore Full Flush Power & Performance -- Fixes weak flushing, leaking, or incomplete flush issues by restoring proper pressure inside the tank. Ensures efficient water usage and consistent flush every time. Premium Quality & Long-Lasting Durability -- Made from high-grade materials with reinforced rubber seals and precision-engineered components. Resists wear, hard water damage, and leaks for long-term reliability. Quick & Hassle-Free Installation -- Includes piston assembly and seals. No special tools needed—simply replace the old part in minutes following standard installation steps. Perfect for both DIY homeowners and plumbers. Cost-Effective Repair Solution -- Save time and money by replacing only the faulty piston instead of the entire flush valve. A must-have part for maintaining pressure-assisted toilet performance.