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About these products
Air Admittance Valves can be used as individual, branch, circuit, or stack vents. They allow air to enter DWV systems to equalize pressure when water drains out of the system. Vent Stack Odor Eliminators are activated carbon filters designed to help stop offensive odors, including hydrogen sulfide, produced in commercial and residential drain pipes and septic systems. They can attach easily to vent stack pipes.
Air Valves and Vents