Simply replace your kitchen odor-resistant one trap and install it. It is self weighted and does not float, so there is no need to screw it down Easy to install and antibacterial properties of copper ions prevent unwanted sliminess from the drain. In order to fully demonstrate the antibacterial power of copper ions, this product is not treated with clear coating, etc., and may change black over time. The copper ions continue to be leached, so you can use them with confidence. There may be cases where leftover rice sticks to the surface due to oil or other applications. In such cases, please clean it with a mild dish soap and a brush.