Ceramic cartridge the heart of a faucet. A cartridge combines hot and cold water inside the faucet and regulates the flow. A Faucet cartridge looks like a car engine, it must run smoothly and continuously. Maximum acceptable pressure around 3.5 Kpa. The maximum acceptable temperature is around 90C. G1-1/4" Drain. How to choose a ceramic cartridge You need to measure the outer cylinder diameter of the water valve ceramic cartridge. The diameter of the commonly used ceramic cartridge is generally 35mm and 40mm. It is recommended to buy two pieces at the same time. In the case, we can check the quality or check if the ceramic cartridge matches the faucet. How to install First, your ceramic cartridge must be compatible with the faucet. Then make sure the ceramic cartridge locating pin is in place (must be installed in the hole) and finally make sure you have tightened the copper cover of the ceramic cartridge. Water saving If you have a leaky faucet, this replacement ceramic cartridge could be right for you. Ceramic cartridge type can prevent water leakage and save water. Durability Made of quality PP plastic and ceramic sheet, practical and durable. This is a 35mm / 40mm Quarter Turn Filter Valves Disc Cartridge. If the water leakage problem has not been solved, you must polish the positioning pins of the ceramic element of the cartridge and install it. 3.5*3.5*5.7cm< /p>