Sanitary appliances (plumbing fixtrure, fixture) refers to the water supply or receive, discharge sewage or dirt containers or devices. Sanitary appliances, an important part of the water supply and drainage system within the building, is to collect and remove the sewage and wastewater produced in life and production equipment. According to its role is divided into the following categories: 1. toilet with sanitary appliances: such as toilet, urinal, etc.; 2. washing, showering with sanitary appliances: such as washbasin, shower, etc.; 3. washing with sanitary appliances: such as washing basins, sewage basins, etc.; 4. special sanitary appliances: such as medical, scientific research laboratories, and other special needs of sanitary appliances.