... 5.Environment-friendly We specialized on PVC-U drainage pipe, High Flow Capacity, Corrosion Resistant, Low Installtion costs, Long service life, Environment- ... not be covered with dirt or contaminated by bacterium.2.Corrosion Resistant: PVC-U Solvent Weld Fittings are non-conductors of ... reactions caused by acids, bases, and salts that cause corrosion in metals.3.High Flow Capacity: The smooth interior ...