标题: Plan a Remodel with the Best Plumbing Vent Diagram for Your Space [打印本页] 作者: MeridithJa 时间: 2024-9-6 15:28 标题: Plan a Remodel with the Best Plumbing Vent Diagram for Your Space As water drains from a sink, it creates a partial vacuum within the pipes, depressing a spring inside the AAV and sucking air in.