What is a Siphon Drain?

Siphon drainage is a drainage method for building roof drainage. It plays an important role in the drainage of rainwater in buildings, especially large buildings and artistic buildings. Siphon drainage is composed of siphon rainwater buckets, siphon drainage pipes and fixed systems.Siphon drainage uses the height of the roof of the building to make the rainwater have potential energy, so that the siphon effect will be generated when the full pipe flows, and the pipe will generate negative pressure at the place where the rainwater continuously flows through the rainwater suspension pipe and transfers to the rainwater standpipe.The roof rainwater can be discharged to the outside at a high flow rate under the suction of the negative pressure in the pipe.The siphon rainwater drainage system forms a siphon, which is divided into five stages: wave flow, pulse flow (pulsating flow), plug flow (pulling flow), foam flow (emulsification flow), and full pipe flow. In the initial stage of rainfall, the rainwater drainage system is suspended The rainwater in the pipe is a non-full pipe flow, mainly wave flow and pulse flow, and the system is in the state of gravity flow.With the increase of rainfall, the water depth in front of the bucket gradually increases, the water flow gradually transitions to plug flow and foam flow, and intermittently produces a siphon full pipe flow state, and obvious negative pressure appears in the suspension pipe.The formation of siphon makes the drainage capacity of the system suddenly increase, the water depth in front of the bucket will fall back, and the system will return to the gravity flow mode.This change will continue for a period of time until the rainfall increases further, the water depth in front of the bucket tends to be stable, the air volume of the system decreases, and finally a stable siphon full pipe flow is formed.There are no special restrictions on the use of siphon drainage pipes, plastic pipes can be used, and stainless steel pipes can also be used. The following is the introduction of HDPE pipe fittings. After nearly 20 years of development in China, the production equipment and manufacturing process of HDPE pipe fittings It has reached the advanced level abroad, and the country has also formulated relevant standards and construction specifications.