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Title: Doesn't live up to the description
Review: I tried this for a basement sink to provide a supplementary vent for the drain line. It simply didn't work. The 'valve' in the vent requires too much suction to open to work as described. The sink drained slowly, when I unscrewed the Sure Vent I heard the air rushing in and the drain water flowed smoothly. Nice idea but it didn't work for me.
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