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Ventilation pipe instructions: The drainage ventilation system includes types such as roof-mounted vents, main vents, auxiliary vents, combined vents, circular vents, appliance vents, converging vents, and specialized vents, each used in different locations; among them, cover-type vents are suitable for installation in water storage tanks and reservoirs. A hood-type vent is a pipe that connects to the atmosphere, installed to ensure air circulation within the drainage system, maintain stable pressure, and prevent damage to the waterproof seal. Performance features of vent pipes: 1. Eliminate toxic and harmful gases from the drainage pipes to meet hygiene requirements ； 2. The vent pipes supply fresh air to the reservoirs, water tanks, and drainage pipes, thereby reducing corrosion of the metal pipes and extending their service life ； 3. Reservoirs and water tanks should be equipped with two or more vent pipes to enhance the efficiency of the drainage system. (For example, when infusing liquid, the bottle must have a vent pipe inserted so that one end is connected to the atmosphere and the other end leads to the space between the liquid surface and the bottom of the bottle; this prevents negative pressure from forming within the pipes, ensures smooth drainage, prevents the formation of stagnant water, stops odors from spreading, reduces fluctuations in air pressure, and protects the water seal from being damaged.) 4. It can quickly remove steam and harmful gases from the reservoirs and water tanks; the built-in gauze and mesh effectively prevent pests, insects, and dust from entering and damaging the water quality. Uses of vent pipes: Drainage vent systems include roof vents, main vents, auxiliary vents, combined vents, circular vents, appliance vents, converging vents, and specialized vents, each used in different locations; among them, cover-type vents are suitable for installation in water storage tanks and reservoirs. A bent-type vent is a pipe that connects to the atmosphere, installed to ensure air circulation within the drainage system, maintain stable pressure, and prevent damage to the waterproof seal.