PP rainwater module has the following features: rainwater collection tank by a number of rainwater harvesting modules. 1, the storage rate: PP rainwater storage module has a porosity of 95%, and more than six tons of compressive strength of two, unlimited capacity: PP rainwater module standard module design, according to the project design into various irregular shapes and size. Fundamentally changing the conventional sedimentation pond, cracking, leakage and many other issues. 3, collecting rainwater: PP module can collect rainwater from roofs, gardens, lawns, paved areas and driveways rain, increasing water storage and supply capacity. 4, do not take up valuable space: PP rainwater module is installed in the ground, can be set up on-demand landscaping, roads, squares, parking lots, playgrounds underground, do not take up floor space, and will not affect the landscape. 5, clean water storage: rain rain PP module before entering through the abandoned stream filtration, water retention within the module under the best conditions, and there is enough space for aerobic activity. This prevents water stagnation due to the impact of water quality anaerobic bacteria.