Go to How Not to Build an Addition Index! This page includes notes on the plumbing vents.


The vent system allows outside air into the drain system to keep vacuums from forming in the drains. Think of vents as upside-down drains with gasses rising in the pipes in the same way that water flows down them. Work backward and upward to the highest tee in the main stack.

Your vent work will finally return you to the attic, where all your plumbing work began. As you are crawling around in that hot, dark space, be mindful of ALL the plumbing traps: pipe glue, roofing nails, methane gas and the ever-present possibility that euphoria over completing the plumbing installation can cause you to slip off a ceiling joist and fall through to the story below.

Next Page

Waste Drain
Pipe Cutter
Mission Transition
Methane Gas

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An Easy Guide to Replace Your Faucet!

Introduction | Decision Making | Design | Permits | Buying Materials | Demolition | Digging | Masonry | Framing | Electricity | Plumbing | Inspections | Roofing | Sheathing / Siding | Soffits | Insurance | Insulation | Fat Fireman Rule | Drywall | Finish Carpentry | Tile | Painting | Carpet | Done

About the Author:
W.J. Rayment built an addition on his house, and in the course of the project learned from his many mistakes. This on-line compendium is his effort to help you learn from his experience. The advice and stories are often humorous, sometimes silly, but always informative. for yourself or as a gift for family or friends.

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