A bathtub is an essential part of every bathroom. There are many kinds of bathtub materials: ceramic, steel structure, acrylic, wood and so on. At present, most of the bathtub materials in the world are still based on ceramics, and one of the most important accessories of the ceramic bathtub is the drainer of the bathtub. A fully functional bathtub drainer can effectively improve the use of the bathtub, improve the service life of the bathtub, and the overflow port with the drainer can prevent the bathtub water from overflowing the bathtub to the rest of the room to break the floor and other furniture.