How to Drain and Vent a Kitchen | This Old House

Summary by Krater

This Old House plumbing experts explain the basics of DWV (drain, waste, and vent) plumbing for a kitchen island, demonstrating how to install a bow vent and maintain proper slope and height above the flood level.

From the video

Answers: How do you install a vent for a kitchen island plumbing system?

• DWV plumbing
• Kitchen island venting
• Bow vent installation
• Drain and waste pipes
• PEX water supply lines

What it concludes

• A bow vent must be installed for a kitchen island sink when conventional venting is not possible.
• The top of the bow vent must be positioned at least 6 inches above the flood level of the sink.
• A relief drain is required on the bow vent to prevent it from filling with water in the event of a clog.