Copper Tubes, manufactured by us, can also be used for general engineering. In residential buildings and small one and two-storey commercial buildings, the drainage piping is usually straightforward in design and simple in installation. Type DWV copper tube, installed with good workmanship by an experienced plumber, will provide many years of trouble-free service. Copper DWV tube has been used successfully for years in all parts of drainage plumbing systems for high-rise buildings for soil and vent stacks and for soil, waste and vent branches. Copper tube''s lightweight and the ease with which it can be prefabricated have been especially important in high-rise drainage systems.