Have you ever wondered what goes on “behind the scenes” of a new build? Well, one of the most crucial aspects of a starter project is rough in plumbing.  It may not be as glamorous as selecting finishes or designing layouts, but it plays a vital role in the overall success of your project. You may not have ever heard of the term, but don’t worry, this article has you covered. In the content below, we’ll delve into:

  • The rough in plumbing definition
  • The importance of rough in plumbing
  • Common mistakes made during installation

By understanding the significance of rough in plumbing and working with a skilled professional, you can ensure that your building project is set up for longevity. Keep reading to get a closer look at rough-in plumbing and its crucial role in your building projects.

What Is Rough In Plumbing?setting up rough in plumbing

Rough in plumbing is the first step in setting up your plumbing system. Any mistakes made at this stage can lead to costly and time-consuming repairs down the line. It involves installing the pipes, water supply lines, and sewage systems that the walls and ceilings will eventually cover-up. This step generally takes place after the general wood framing of a property.

The Importance of Proper Rough-In Plumbing

One of the main reasons why rough in plumbing is so important is that it ensures that all plumbing components are properly sized and located. This is crucial because it determines how well your plumbing system will function once it’s completed.

If the pipes are too small, for example, they won’t be able to handle the amount of water that’s flowing through them. On the other hand, if the pipes are too large, they’ll take up more space than necessary.

Another reason why rough in plumbing is essential is that it sets the foundation for the rest of your plumbing system. Again, if there are any issues with the rough in plumbing, it’ll lead to problems later. 

For instance, if a pipe is not installed properly, it could start leaking once the water is turned on. As a result, there could be water damage, mold growth, and other problems that are difficult and expensive to fix.

The Components of Rough In Plumbing

plumbing pipes rough in plumbing

Rough-in plumbing involves installing several components to get things set up. These parts include pipes, valves, fittings, and vents. Let’s take a closer look at each one:


Pipes are the most important component of rough in plumbing. They carry water, waste, and other materials throughout your plumbing system. They’re made of various materials, including copper, PVC, and PEX. The type of pipe you choose will depend on your specific needs.


Valves are used to control the flow of water and other materials through your plumbing system. They’re installed at various points throughout the system, including at the main water supply and individual fixtures. There are different types of valves, such as gate valves, ball valves, and globe valves.


Fittings connect pipes and other components of your plumbing system. The various kinds of fittings are elbows, tees, couplings, and adapters.


Vents allow air into your plumbing system. They’re installed on the roof of your building and prevent water from siphoning out of the traps. Vents are required by building codes and are an important aspect of any plumbing system.

A Simple Guide to Rough In Plumbing

plumbing system with pipesRough in plumbing involves several steps that must be completed in a specific way. Here is a quick, simple guide:

  • Planning the plumbing system: Before installing the plumbing system, there should be a plan in place. The plan must include the location of each fixture, the size of each pipe, and the location of each valve and vent.
  • Install the water supply: The first step in rough in plumbing is to install the water supply. This involves installing a main shutoff valve and running the main water line to each fixture.
  • Install the waste and vent lines: Once the water supply is installed, the next step is to put in the waste and vent lines. This requires running pipes from each fixture to the main waste line and inserting vents on the roof.
  • Put in the fixtures: After the waste and vent lines are inserted, the next step is to position the fixtures. This includes installing the toilets, sinks, showers, and other plumbing components.
  • Test the system: Once the parts are positioned, it’s a good idea to test the system to ensure that everything is working properly. To test the system, a professional must turn on the water and check for leaks and other issues.

Common Mistakes Made During Rough In Plumbing
Rough in plumbing is a complex process that requires skill and experience. There are a few mistakes that are often made during the process. Here are a few of them:

Improper sizing of pipes: This is one of the most frequent mistakes made during rough in plumbing. The pipes must be the proper size. Otherwise, everything will be a disaster. As you can imagine, the wrong pipes could create inefficient water flow, leaks, and more.

Poorly installed fittings: Fittings are used to connect pipes and other components of your plumbing system. If they are not installed the right way, they can leak and cause other issues.

plumbing connections and sizing Improperly installed vents: Vents are an essential part of your plumbing system. If they are not put in correctly, it can cause problems like sewer gas entering your property.

Not following building codes: Building codes are in place to ensure that your plumbing system is safe and functional. If you do not follow the guidelines, you could be fined and required to make costly repairs.

The Benefits of Hiring a Professional Plumber for Rough In Plumbing

Rough in plumbing is quite complex, and it’s a process that’s best handled by experts. Hiring a professional plumber for this job has benefits, including:

Knowledge and Experience

A professional plumber has the knowledge and experience needed to install your plumbing accurately. They know how to size pipes, install fittings, and put in vents to ensure that your plumbing system is safe and functional.

Compliance With Building Codes

A professional plumber knows the building codes in your area and can ensure that your plumbing system is compliant. This can save you from fines and a huge headache.

professional plumber work

Confidence in Your Plumbing System

By hiring a professional plumber, you can feel confident that your plumbing system is installed correctly and will function as it should. There’s nothing like having peace of mind.

Rough In Plumbing Inspections: What to Expect

Rough in plumbing inspections are essential in the construction process of any building. It’s conducted to verify that the plumbing system is installed accurately and meets all guidelines.
Before the walls and other finishing touches are added to the property, an inspector comes in to look at everything. This allows the inspector to check for any errors or defects in the plumbing that may be difficult to correct after the building is complete.

They’ll inspect the plumbing system’s layout, including the location of the pipes, their size, and their type. They’ll also check that the pipes are adequately supported and that they have the correct slope for proper drainage.

The inspector will also check out the plumbing fixtures, such as toilets, sinks, and showers. The objective is to make sure that they were put in correctly and, of course, meet code requirements.

Furthermore, the examiner will check if the plumbing system is properly vented and can prevent the buildup of harmful gases. In addition to all of the other plumbing components, they’ll also inspect the water supply system. The inspector will take a look at the water meter, shut-off valve, and pressure regulator to ensure that everything is okay and ready to go.
professional plumber fixing the plumbing system

If any issues are found during the inspection, the inspector will provide a detailed report outlining the necessary corrections. The plumbing contractor will then need to correct any deficiencies before the final inspection is conducted.

Once the corrections are made, a final inspection is done to verify that all of the issues were addressed.

Let Us Handle Your Construction Plumbing

As you can see, rough in plumbing requires intricate detail and expert plumbing skills. Well, that’s what we’re here for. At Paladin Plumbing, we’ll make sure that your new build has the proper plumbing and your property is set up for success.

We offer a variety of services, including new construction plumbing installations, inspections, and more. There’s no need to worry. Our experienced team members will get your building up to par. 

To inquire more about how we can assist you, call us at 763-363-7920, or visit our website to get a free estimate. We’ll be in touch with you shortly!