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Plumbing rough-in

Supply and drain layouts, pipe sizes and venting. Ask with your Sheet attached: homeowners who’ve done it and verified pros answer, and anyone can read it.

Systems · 01Before you ask

Before you ask

The fixtures, the pipe type, and a sketch or photo of the layout.

  • Attach your Sheet so people see your sizes and the math.
  • Your town is enough. Never your address; check photos for house numbers and plates.
  • Is it safe? A safety question here goes to pros verified in plumbing, unless you pick another trade. Only they can call it safe or unsafe.
Systems · 02Plumbing rough-in

Plumbing rough-in

3 fixtures: 5 drain fixture units, a 3″ drain branch, 1½″ vents and ¾″ + ½″ water lines, every fitting counted.

What people get wrong:

  • Roughing in before the fixtures are picked. Toilets come in 10″, 12″ and 14″ rough-ins, tub drains go left or right, and wall-mount faucets need their own stubs.
  • A sanitary tee on its back. Sanitary tees only turn flow from horizontal into vertical.
  • A vent below the trap weir. A vent that leaves the trap arm below the weir, or a trap arm longer than the table allows, siphons the trap dry and lets sewer gas in.

The worked example, every line's math and the code notes · Your own sizes in the app

Systems · 03More in Systems

More in Systems

Systems · 04How the community works

How the community works

  • Open to read from anywhere, no account needed.
  • Sign in with your email to ask, answer and vote. No password.
  • The best answers rise: votes, “worked for me” and a solved mark. Verified pros carry a badge.

Questions? Write to support@studsheet.com.

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