Flush gate cartridge assembly is designed for power flush toilet replacement part , works in 1.6 GPF , 1.28 , and 1.0 GPF ( Gallon Per Flush ) tanks , fits for 500 , 501 , 501A and 504 Series pressure assist tanks systems The C-100500-K flush cartridge set is suitable for flushmate M-101526-F , M-101526 , M-101526 , MA101526-F , M-102540-F , M-102540 , M-102540 , M-102540 , and M-102540-C pressure assist tanks This cartridge set can help you fix your break toilet quickly Easy operate , directly replace , more , an option for household and toilets repair The cartridge assembly is the main gate that opens and closes to deliver the water to the toilet bowl ; Installing our new flush cartridge assembly set when your toilet has problem with the water running and weak flushes , is a good option for you Made from robust , this flush gate cartridge assembly is engineered to withstand wear and tear , providing a cost-effective solution without compromising durability, Manufacturer: Zenlir