40MM FAUCET CARTRIDGE REPLACEMENT SPECIFICATIONS Material: Ceramic and PPO Max.Temperature: 95ºC Key Size: 40mm in Diameter PACKAGE INCLUDES 1 x 40mm Faucet Cartridge How to choose the correct valve core How to choose the correct faucet cartridge? Determine the bottom valve core diameter. Overall photo of the faucetInterior photos of the faucetPhoto of the bottom of the old ink cartridgeMeasurement photo of the bottom diameter of the old ink cartridge ( If you are not sure about the size to use, you can provide the following 4 data and we will provide you with professional suggestions. ) Find the distance from the valve core center to the positioning feet. Installation Steps Step 1 Remove the hot and cold plug with tool. Step 2 Remove the handle with Allen Key. Step 3 loosen the decorative ring by your hands Step 4 Remove the hexagon nut with a wrench. Step 5 Take out the old faucet cartridge and replace the new one. Step 6 Install the hexagon nut, decorative ring, handle and plug step by step. Then finished. What is a Faucet Cartridge and How Do They Work? A cartridge faucet was the first single-handled mixing faucet, invented by Al Moen after he was scalded by hot water too often. Since then, modern cartridges have become more complex and elegant than Moen’s original design. However, they all follow the same basic principle. By rotating the handle in one direction, these holes will allow for hot water to flow and rotating the handle the other direction will allow cold water. Therefore, the cartridge allows you to control both the water temperature and the flow rate. WHEN SHOULD I REPLACE MY FAUCET CARTRIDGE? If you know that your faucet is several years old and you’re noticing any of the following symptoms, it is probably time to replace one or both of your faucet cartridges: Leaks when the handle is in the off positionFaucet handle is hard to operate What is a Faucet Cartridge and How Do They Work? WHEN SHOULD I REPLACE MY FAUCET CARTRIDGE?