Zhejiang Sanshui Pipeline Co., Ltd., located in Lanxi City, Zhejiang Province, is a technology-based enterprise specializing in the production, sales, installation, and provision of professional PE pipeline application solutions and services for siphon roof rainwater drainage systems. The main products include HDPE water supply pipes and their accessories, HDPE siphon same layer drainage pipes and their accessories, and HDPE steel wire mesh skeleton pipes and their accessories.

The company has always been a benchmark in the industry in terms of scale, with a production land of about 14000 square meters and more than 100 auxiliary equipment such as injection molding machines, extruders, CNC special machines, stamping machines, robots, etc. The company is currently in the stage of establishing an "intelligent, manufacturing, and digital factory" and the "National Chemical Building Materials Quality Supervision and Inspection Center"

The siphon drainage system adopts a special anti-whirlpool rainwater bucket with air baffle and water inlet grille. In the process of rainfall, rainwater enters the rainwater bucket through the grille and side. When the roof catchment reaches a certain height, the anti-vortex performance in the rainwater bucket will prevent air from entering from the outside and make the rainwater flow into the drainage pipe smoothly. The energy generated by the height difference between the roof and the ground is used to create a partial vacuum in the pipeline, forming a suction effect to quickly drain the rainwater. Based on the formation principle, the "Bernoulli" equation is used, and after careful calculation, the flow rate and pressure of rainwater in the pipeline are effectively controlled and balanced, and the water on the roof is drained at a very fast speed.

Airport, high-speed rail, gymnasium, exhibition hall, large factory building and other large building roof drainage. (HDPE same floor drainage) used in office buildings,
High-rise residential, hotels, guesthouses and other toilet drainage.