Running Plumbing Through Floor Instead Of Outside Wall

Vent the waste and drain lines when you are installing the piping in a vertical direction.

Running plumbing through floor instead of outside wall.

When you need plumbing in exterior walls. If your pipes are going in a lateral direction make notches in the studs instead of drilling holes in them. Placing water pipes in outside walls greatly increases the risk of frozen and burst pipes in cold climates. We re all taught not to run plumbing in exterior walls.

Use a carpenter s level to mark the studs for drilling holes. 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. Running drainpipe through joists calls for meticulous work. Instead of running from floor to ceiling a soffit runs across the top of a wall.

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. 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. Step 7 vent the waste lines. Pipes that are encased in concrete for in floor heating for example are ok because the concrete holds them in place.

Drill holes cut pipes and connect them in a dry run using drain fittings. I live and work in the cold boston area. 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 most cases the lines will come through the floor.

This needs to extend through to the roof. You need to make sure that you use black plastic that is 1 1 2 inch in size. The chase is most commonly used for running new vent stacks. When running the pipes through the studs first be sure to drill the holes in the center so that when it s time to hang the wall board the screws or nails don t reach the pipes and damage the pipes.

Inside pipes can be run vertically to accommodate new plumbing. Sometimes the wall is insulated but not the rim joist between floors and you get freezing there. When running pipes from a slab to an attic use an inside wall. Similar to the chase is the soffit.

Often the most economical way to replace the original plumbing is running pvc cpvc or pex tubing through existing walls ceilings and crawl spaces. Run the horizontal vent lines sloped downward toward the fixtures at a rate of 1 8 to 1 4 inch per running foot. In some cases the lines will have to be run across the wall studs. If you are plumbing a vanity consider coming up through the floor rather than in the wall.