Drainage channel length by all drainage, trunks. Branch and inspection wells, connection wells, inlets and calculation of equal length, not including rainwater drains the mouth to the connecting pipe between the pipe and open channel into the household. The calculation should be single-tube computing, that is on the same street as if two or more side by side drains, drainage channels and each should be the length of the calculation. PVC (polyvinyl chloride) plastic pipe is a modern synthetic material pipe. But the scientific community found, can become more flexible PVC phthalate chemical additives, pvc drains price, the human body kidney, liver, testicles great impact, drains, cause cancer, kidney damage, damage to the human body functions recycling system, hdpe drainage, affecting development. Generally, because of its strength far from the pressure applied to the water requirements, drainage slope, so rarely used in water pipes. In most cases, PVC pipe for wire and pipes and sewage pipes. Pvc drains common specifications based mainly in nominal diameter, respectively, 32mm, 40mm, 50mm, 75mm, 90mm, 110mm, 125mm, 160mm, 200mm, 250mm, 315mm, 400mm, 500mm, most of the specifications are pvc drains a gap, which is a normal phenomenon. The length of the PVC-U pipe is generally 4m or 6m, other lengths are then determined by the supply and demand sides negotiated. _ _ Double clear plastic drain drainage slope by Xiong Zan Pair bright plastic products factory. Xiong Zan Pair Ming plastics factory (1620231.707070.cn) is a professional "pvc drainage pipe, pvc pipe, electric power pipe, glass pipe, steel pipe," the company. Since its inception, we adhere to the "good faith, sound management" approach, the courage to participate in healthy competition in the market, so that the "two-out" brand has a good reputation. We adhere to the "service first, customer first" principle, so that two-out plastic congregation has won the trust of customers in UPVC pipe, and establish a good corporate image. Special Note: This information is for reference only pictures and information, please contact us to obtain the most accurate information, thank you!