Zhonglong Siphon Drainage Board is manufactured from premium high-density polyethylene (HDPE) with a cup-shaped convex surface structure bonded with a geotextile filter layer, available in various heights and roll sizes to meet project requirements. Unlike traditional passive drainage systems, this innovative board operates on the siphon effect principle—once the system is fully saturated, water is rapidly drained through the combined action of gravity, atmospheric pressure, and negative pressure, achieving a flow rate approximately three times higher than conventional drainage methods. The cup-shaped convex points provide high-strength support, ensuring stable three-dimensional drainage space even under heavy loads, while the geotextile layer prevents soil intrusion and clogging. This active drainage solution is widely used in roadbed drainage, underground construction waterproofing, landfill leachate collection, green roofs, retaining wall drainage, and athletic field drainage systems.
