... Prevent returning of smell & water Anti-reptile & bacteria Prevent blockage Horizontal Type Sanming Industrial Science&Technology (Tianjin) Co.Ltd inherits ... the problem such as storing sewage, little flow, easy blockage, easy damage and easy rust-eaten, and it has ... taste, prevent returning water, prevent reptile, prevent bacterium, prevent blockage.b. The section area of drain passageway is big, ...