The first way: lay the drain pipe on the ground. This method is generally used in the renovation of old buildings. It is best to install a toilet with a rear outlet, and a horizontal pipe layout is used for the drainage of showers, bathtubs or washbasins. This drainage method must raise the shower or bathtub, which may affect the inconvenience when showering or washing, and the drainage pipe will be exposed in the bathroom, which is also unsightly from an aesthetic point of view. In this way, the floor drain mainly adopts side drainage, and the indoor use of riser arrangement, or it is not necessary to use floor drain.
