Description of HDPE Siphon Fittings CHUANGRONG siphon pipe system is China’s Geberit, which represents the most advanced technology in rainfall drainage of roofs of large and medium-sized buildings. The system uses the height of the building as the driving force. Through the action of negative pressure, it can achieve high-speed flow velocity, thereby maximizing the drainage efficiency. The result is a state-of-the-art rainwater harvesting system that can be installed as required by the Green Building Plan. CHENGDU CHUANGRONG provides a one-stop supply of HDPE siphon piping system products, Including HDPE siphon pipes, fittings, hot-melt and electric fusion welding machine designs. The outlet also integrates special components that can be installed on any type of roof and waterproof panel.