1. Efficient toilet tank chain drainage: This flush valve is designed to improve the efficiency of your toilet by providing half full and double drainage options. The chain toilet drain valves ensure effective water flow and prevent blockages, ensuring a smooth rinsing experience. 2. STURDY AND DURABLEMade of plastic and stainless steel, this flush valve is built to last. Its resilient properties ensure longterm durability, making it a reliable choice for your toilet's drain system. 3. LEAKPROOF DESIGN: Say goodbye to annoying leaks with the rubber gasket included in this flush valve. The welldesigned seal eliminates the risk of water leakage, ensuring a tight fit between the valve and tank, keeping your toilet dry and functioning flawlessly. 4. ADJUSTABLE WATER FLOW: This flush valve allows you to adjust the water level in your tank, providing flushing performance. With its adjustable settings, you can achieve an effective seal and prevent unwanted leakage.