Planning Plumbing Routes Part 2 of 2

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The first, and perhaps most important, step when replacing old plumbing is to decide how and where to run the new pipes. Since the stud cavities and joist spaces are often covered with finished wall surfaces, finding routes for running new pipes can be challenging.

 

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Overview

The first, and perhaps most important, step when replacing old plumbing is to decide how and where to run the new pipes. Since the stud cavities and joist spaces are often covered with finished wall surfaces, finding routes for running new pipes can be challenging.
When planning pipe routes, choose straight, easy pathways whenever possible. Rather than running water supply pipes around wall corners and through studs, for example, it may be easiest to run them straight up wall cavities from the basement. Instead of running a bathtub drain across floor joists, run it straight down into the basement, where the branch drain can be easily extended underneath the joists to the main waste-vent stack.
In some situations, it is most practical to route the new pipes in wall and floor cavities that -already hold plumbing pipes, since these spaces are often framed to provide long, unobstructed runs. A detailed map of your plumbing system can be very helpful when planning routes for new plumbing pipes.
To maximize their profits, plumbing contractors generally try to avoid opening walls or changing wall framing when installing new plumbing. But the do-it-yourselfer does not have these limitations. Faced with the difficulty of running pipes through enclosed spaces, you may find it easiest to remove wall surfaces or to create a newly framed space for running new pipes.
On these pages, you will see some common methods used to create pathways for replacing old pipes with new plumbing.
From: The Complete Guide to Plumbing, 978-1-58923-378-2

What You'll Need

Tools:

demolition tools
drill
saw
screwdriver

Materials:

demolition tools
drill
saw
screwdriver

 

Step 1

Planning Pipe Routes

Remove wall surfaces when access from above or below the wall is not possible. This demolition work can range from cutting narrow channels in plaster or wallboard to removing the entire wall surface. Remove wall surfaces back to the centers of adjoining studs; the exposed studs provide a nailing surface for attaching repair materials once the plumbing project is completed.


Step 2

Planning Pipe Routes

Create a detailed map showing the planned route for your new plumbing pipes. Such a map can help you get your plans approved by the inspector, and it makes work much simpler. If you have already mapped your existing plumbing system, those drawings can be used to plan new pipe routes.


 
 

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