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.

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