Bathroom DWV Plumbing Diagram

This simplified DWV schematic shows how a bathroom's lavatory, shower, and toilet waste branches join a common building drain. A cleanout provides an access point on the branch, and a vent connection is shown from the lavatory side toward the roof. The pipe labels distinguish smaller fixture branches from the larger toilet and building drain. Drain, waste, and vent systems protect trap seals and carry wastewater to the sewer or septic connection, but their exact arrangement must meet local plumbing code. This drawing is useful for discussing system logic during a remodel. It is not a permit-ready layout: actual fitting types, vent distances, slopes, fixture units, and routing need to be designed for the building and jurisdiction.