Plumbing on an exterior wall: What to know

In the design of sanitary installations, it is possible to have plumbing on an exterior wall, but not all walls apply to this. Usually, the ones that can work in this way are those of the bathrooms, rainwater drainage, and attic ventilation, among others. Here we tell you more about pipes in exterior walls.

Can plumbing be on an exterior Wall?

Yes, plumbing can be on an outside wall. In fact, it is quite common to have plumbing pipes running through exterior walls in residential and commercial buildings. However, there are some considerations:

Considerations to do it

Weather

One concern is the potential for freezing pipes in colder climates. Exterior walls are more exposed to the elements and can be more susceptible to freezing temperatures, which can cause the pipes to burst and result in water damage. To prevent this, it is important to properly insulate the pipes and the wall to protect them from extreme temperatures.

Likewise, if you live in a flood zone, you should know if your piping is below the flood line.

At what temperature do exterior pipes freeze?

The freezing point occurs when the water is at 32°F. Proper insulation of pipes prevents this from occurring. Thick insulation will be the best option to prevent pipe damage from low temperatures.

Materials

The materials you use combined with the weather can be a fatal combination or an excellent duo. For example, galvanized iron is prone to freeze or crack faster than PVC pipe. However, whatever you choose, you must ensure that the joints are properly made and well-sealed to avoid leaks.

Design

This has to do with the collection of rainwater, these need special drainage depending on the amount of water that accumulates.

As we have been saying, it is all in the factors to consider.

Local building codes and regulations

That dictates the minimum distance between plumbing pipes and exterior walls. It is important to consult with a licensed plumber or building inspector to ensure that the plumbing installation meets all necessary codes and safety requirements.

Is it ok to put shower plumbing on the exterior wall?

It is generally okay to install shower plumbing on an exterior wall.

As we have been saying, it is all in the factors to consider.

Can you put a toilet on an exterior wall?

Yes, it is possible to install a toilet on an exterior wall. By following our recommendations you can do it

Advantages of exterior plumbing

Cost reduction. This is because there is no need to excavate the space through which the pipes run.

Preventive maintenance. This is because being outdoors can be easily accessed, compared to, for example, indoor plumbing.

Disadvantages of outdoor plumbing

They are vulnerable to freezing. Here good pipe insulation is the solution.

Leaks. Because they are always exposed to the elements, leaks can develop and lead to leaks in your home.

You need a specialized plumber because working at a height on the outside wall poses a risk to the worker.

Installing plumbing on the exterior wall is a quick and efficient solution to the design. However, it does have its disadvantages when in contact with the elements. Whether you live in a cold or flood zone, you should be especially careful if you already have plumbing in an exterior or intend to install it.

Read more: Plumbing code for vent pipes

Written by Vanessa Gallanti. July 4, 2023

Enthusiast about planning, project management, construction materials and technology, and construction. A civil engineer from Los Andes University and a content writer for Kukun.