Specifically designed for rainwater drainage systems. It is intended for scenarios where a reduction in pipe diameter is required. The coupling is made from high-quality PVC material, offering corrosion resistance and anti-aging properties. This ensures long-term stability and reliability, as it can effectively withstand the acidic or alkaline substances and UV radiation present in rainwater.
The product comes in four sizes: D50, D75, D110, and D160, catering to different pipe diameter requirements for various scales of rainwater drainage systems. The packaging quantities are as follows: 504 pieces per box for D50, 210 pieces per box for D75, 120 pieces per box for D110, and 60 pieces per box for D160. These quantities have been carefully considered to meet the practical needs of engineering projects, facilitating bulk procurement and construction.
The PVC material is lightweight and easy to install, with good flexibility and impact resistance, ensuring structural integrity even in complex environments. Additionally, the design complies with international standards, featuring tight joints and sealing performance to prevent leaks, ensuring smooth rainwater discharge and avoiding potential issues caused by water accumulation.

Shanghai Pirsa Pipe Industry Co., Ltd. was established in 2003. We have two production bases located in Shanghai, China and Zhoukou, Henan Province, with cooperative bases covering Fujian, Anhui, Yunnan, Chongqing, and Shenyang in China. The factory covers an area of 100000 square meters; Over 100 production lines with an annual production capacity of 100000 tons and an annual sales revenue of 600 million RMB.
The products include PP-R, PE-RT, PE water supply pipes PB、 Nearly a hundred series of products including stainless steel drinking water pipes, HDPE drainage pipes and double wall corrugated pipes, PVC-U drainage pipes and electrical conduit, PVC-C high and low voltage power pipes, switch sockets, bathroom plumbing, and pre purified water.
The company was established in 2003
Factory area of 100000 square meters
Over 100 production lines