Running Plumbing Through Floor Instead Of Outside Wall

When you need plumbing in exterior walls.

Running plumbing through floor instead of outside wall.

You need to make sure that you use black plastic that is 1 1 2 inch in size. Placing water pipes in outside walls greatly increases the risk of frozen and burst pipes in cold climates. This needs to extend through to the roof. Pipes that are encased in concrete for in floor heating for example are ok because the concrete holds them in place.

We re all taught not to run plumbing in exterior walls. In most cases the lines will come through the floor. Running drainpipe through joists calls for meticulous work. Step 7 vent the waste lines.

Instead of running from floor to ceiling a soffit runs across the top of a wall. Drill holes cut pipes and connect them in a dry run using drain fittings. While homeowners may fret over running plumbing lines through the ceiling it is a common practice used to minimize damage during the re plumb and to keep labor costs lower. When remodeling bathrooms we always plan to install all plumbing lines inside interior walls and avoid running plumbing in exterior walls due to the reality of the pipes freezing.

In some cases the lines will have to be run across the wall studs. Inside pipes can be run vertically to accommodate new plumbing. Run the horizontal vent lines sloped downward toward the fixtures at a rate of 1 8 to 1 4 inch per running foot. Sometimes the wall is insulated but not the rim joist between floors and you get freezing there.

The holes must follow a straight line across the floor and must ascend or descend so the pipe will be sloped 1 4 inch per foot. If you are plumbing a vanity consider coming up through the floor rather than in the wall. When running pipes from a slab to an attic use an inside wall. Often the most economical way to replace the original plumbing is running pvc cpvc or pex tubing through existing walls ceilings and crawl spaces.

If your pipes are going in a lateral direction make notches in the studs instead of drilling holes in them. Vent the waste and drain lines when you are installing the piping in a vertical direction. The chase is most commonly used for running new vent stacks. And pipes running straight through wood studs and joists are fine too just protect the pipe in areas where it bends as it passes through.

Or just a little breeze of cold air such as a crack in a crawlspace or top of a basement wall is just enough to freeze a couple of inches of pipe. This allows plumbing to run from the basement to the attic. I live and work in the cold boston area. Similar to the chase is the soffit.