Villa downspouts from the roof gutters, rainwater pipes and related components, also known as the villa roof drainage systems. Effective collection of roof rainwater, which organized rational rainwater discharge from the building, which not only can effectively complete roof rainwater emissions, while extending the life of the building, played a certain decorative effect. According to the classification of different materials, garden water system has two classifications, ie PVC garden water system, metal garden water system. Wherein the metal villas water system, because it is more durable, beautiful, cost performance characteristics, has been widely used, has become one of the country downspouts villa indispensable. Villa drowning style and fusion system and the building has a unique seamless pipe using rainwater, prevent rain spilled outside. Stainless alloy plate high strength, light weight, anti-aging, corrosion resistance characteristics. Green, recycled water system, the natural environment will not cause any pollution, in line with national green building requirements. Metal fell into the water less system accessories, easy to install, fitting connection between the natural stability.