How to Diagnose a Gurgling Sink

Watch the full episode: https://www.thisoldhouse.com/watch/ask-toh-dutch-door-landscape-checkers Ask This Old House plumbing and heating expert Richard Trethewey shows host Kevin O’Connor the proper way to ventilate a sink. Click here to SUBSCRIBE to the official This Old House YouTube channel: http://www.youtube.com/subscription_center?add_user=thisoldhouse Cost: $20 and Up Skill Level: Moderate Tools List for Diagnosing a Gurgling Sink: Pipe wrench Shopping List: PVC pipes Ste

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