The second way: the lift-up method is to raise the ground by about 300 to 400 mm, the drainage pipe is buried below, and the bathroom appliances will be in the form of lower drainage. But there are also disadvantages. If the drain pipe leaks, the same level will be submerged, and the floor of the bathroom will be raised, so there will be a step, so the water in the bathroom can easily overflow, so this method is rarely used. , most commonly a public restroom. The way of the floor drain mainly adopts the lower drainage, this kind of floor drain is very flexible and can still be used.
