The PVC Flat Reducing Coupling, Its flat, low-profile design allows for easy installation in confined spaces, offering space-saving benefits without compromising connection strength. Constructed from high-quality PVC, it delivers resistance to corrosion and aging, making it ideal for long-term use in damp or chemically aggressive environments.
With differing diameters on each end, this coupling enables a smooth transition between pipe sizes, minimizing fluid turbulence and enhancing flow efficiency. The interior is precision-smoothed to reduce friction, ensuring uninterrupted and efficient media transmission. It is widely used in agricultural irrigation, building drainage, water treatment systems, and industrial piping applications.
Designed to meet international standards, the coupling undergoes rigorous pressure testing to guarantee safety and reliability under rated operating conditions. Installation is simple and tool-free—just apply solvent cement for a secure, leak-proof joint. Its sleek, compact form makes it a alternative to traditional metal fittings.

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