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A sewer air shuttle valve is formed by additionally arranging an air shuttle valve device under an original well lid of a sewer, the thickness of a valve is uneven, and the specific weight is unbalanced. The air shuttle valve keeps closed automatically in a normal state, when it rains, a water pot hole at one side of the air shuttle valve retains water, so that the specific weight is increased and the air shuttle valve opens automatically to drain the water, and after the water is drained out, the valve closes automatically. The sewer air shuttle valve has the advantages of being simple in structure, convenient to install and low in manufacturing cost, it is effectively prevented that the bad smell in the sewer discharges outward, air pollution is prevented, and natural environment is protected.
A sewer air shuttle valve is formed by additionally arranging an air shuttle valve device under an original well lid of a sewer, the thickness of a valve is uneven, and the specific weight is unbalanced. The air shuttle valve keeps closed automatically in a normal state, when it rains, a water pot hole at one side of the air shuttle valve retains water, so that the specific weight is increased and the air shuttle valve opens automatically to drain the water, and after the water is drained out, the valve closes automatically. The sewer air shuttle valve has the advantages of being simple in structure, convenient to install and low in manufacturing cost, it is effectively prevented that the bad smell in the sewer discharges outward, air pollution is prevented, and natural environment is protected.