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How to Read Plumbing Blueprints: 5 Easy Steps

Planning on constructing your new home’s plumbing lines yourself. If so you will need to know how to read the blueprints. If you don’t know-how, you will be in a mess, and that’s a pain.

How to read plumbing blueprints?

You must apprehend the plumbing insignia on a blueprint. Position the blueprint on a straight surface. After reading the timetable and blueprint, look at the logos given to consequential fixtures. Inspect the stamps for gas lines, radiant heating water pipes, and sewer connections as well.

Has this piqued your interest in learning more? Then continue to read on because this was only a peek. Let’s do a deep dive below!

What is a Blueprint?

A blueprint is a collection of 2-D drawings. It is a precise graphical portrayal of how an architect envisions a project. Blueprints often define the measurements, building supplies, and precise positioning of all a building’s features.

What are the important parts or main sections of a blueprint?

The important parts of a blueprint are: 

  1. Title Sheets
  2. Site Plans.
  3. Floor Plans.
  4. Elevations and Sections.
  5. Details and Schedules.
  6. Structural Drawings.
  7.  Electrical, Mechanical, and Plumbing Structures.

These are the components that make up a blueprint. 

Here’s How Your Read a Plumbing Blueprint

We’ve broken it down into 5 steps of how to read a blueprint. But before you get to reading the blueprint you need to know the three processes involved.

What are the three processes involved in interpreting a blueprint?

There are 3 main viewpoints for 2D building plans: plan, elevation, and section. 

Recognizing which of them has been used is a starting point in interpreting any diagram. A blueprint is a bird’s-eye view of the job that is to be done. This is typically performed in a flat direction 30″ just above the floor.

Step 1: Identify Plumbing Symbols

First and foremost, you must understand the plumbing figures on a schematic. You can study symbolism by doing a search online or by reading a textbook.

A complete set of blueprints has a vast amount of details that must be included.

Hence architects reduce the info on the drawings. They also set standardized symbols. 

You’ll need to understand these symbols and abbreviations. Understanding the symbols and abbreviations will make the blueprint easier to read and feel less cluttered. Without understanding these symbols, you cannot understand the blueprint. Let alone read it.

Every set of architectural drawings contains a symbol legend for reference. You can look up a symbol in the legend. If you don’t know what it means.

Step 2: Place the Blueprint on a Flat Surface

The blueprint should next be opened and placed on a level surface.  Open the schematic to read the entire page in one go. You ought to be familiar with these designs. Therefore should concentrate on the regions where piping is more concentrated.

Step 3: Read Schedules

You should become familiar with the timetables and read schedules that come with plans. These plans will inform you of the materials needed for the specific job. You must properly look through which signs are used. By doing so you can obtain the important components.

You can establish double vanity drain plumbing on the sink too. That is after knowing the plans.

Step 4: Identify Symbols for Major Fixtures

After reviewing the timetable and schematic, you must look at the icons given to significant components. Examine the drainage indicators for sinks, bathtubs, showers, and toilets before tracing the drainage pipes from them. 

That’s because you need to know their exact situations. That is for the drainage system. In this way, you can have a complete knowledge of their functions, where they lead to and others.

Remember, if you’re unsure about a pattern, you could always look it up online or in a book. You’ll need to know this when you’re trying to get water out of your basement.

Step 5: Other symbols

Inspect the markings for gas pipelines, heat recovery water mains, and wastewater hookups, as a plumber will have to know about them as well. These are kind of precautionary functionalities. These will come in handy during emergencies.

That’s it. In this way you can read the blueprints of plumbing.

Here’s How You Measure a Blueprint

Reading the blueprints is not enough on its own. Now that we’ve covered how to read a plumbing blueprint. We decided you should learn how to measure it. You can measure in some easy steps.


  1. Unwrap the blueprints and place them on a level surface.
  2. Determine the drawing’s dimensions.
  3. Select a calibrated ruler that corresponds to the scale of the design.
  4. Place the appropriate scale beside the object on the diagram and examine it.

We hope that you’ve understood how to properly measure a blueprint.

To measure the prints you will need some measuring scales. To help you, we have recommended some:

Product 1
Product 2

We also showed you how you can read and measure the blueprints. That will come in handy for you. If you’re trying to add a new bathroom to your home, then you’re prepared.


Question: Do plumbers consult blueprints?

Answer: Plumbing plans provide information such as the shape and quality of basins as well as the placement of gas pipelines, drains, and ventilation. Contractors may need to take considerable training to understand how to interpret all the intricacies of a network design.

Question: What is the best way to read a production framework?
Answer: The first number indicates the bit’s real size, while the second digit depicts the impression. In other words, 1:2 signifies that the printing is twice the size of the real size. Meanwhile, 3:1 denotes that the real size is 3 times greater than what is represented in the print.

Question: In plumbing, what is the stack?
Answer: The plumbing stacks in your residence is the central point from which all of your estate’s drainage fittings originate. It is the system that can be defined through which sewage sludge and polluted water pass before being discharged into the sewer line beneath your property.


Now that you’ve learned everything on how to read plumbing blueprints we hope you’re pleased. It’s important that you know your way around a blueprint if you’re going to work on your home. 

The ability to read plumbing blueprints will also help when you’re trying to renovate your home.