Your Guide to the 13 Inch Rough in Toilet: Measurements, Challenges, & Tips

Are you in the market for a new 13 inch rough in toilet? If so, you’ve come to the right place. In this article, we will explore everything you need to know about 13 inch rough in toilets, including why the correct rough-in measurement is crucial for installation.

Did you know that the rough-in measurement refers to the distance between the wall behind the toilet and the center of the toilet’s waste outlet? This measurement is crucial for a proper fit and functionality of your 13 inch rough in toilet. So, whether you’re replacing an existing toilet or building a new bathroom, understanding the ins and outs of 13 inch rough in toilets is essential.

Join us as we delve into the challenges, best toilet options, and installation tips for this specific rough-in size. Let’s get started with 13 inch rough in toilets!

Quick check: the highlights of the article

  • A 13 inch rough in toilet refers to the distance between the wall and the center of the toilet drain.
  • It is important to measure the rough-in correctly to ensure a proper fit during installation.
  • Choosing between a 12 inch and 14 inch rough in toilet can present challenges, but there are options available for a 13 inch rough in toilet replacement.

13 inch rough in toilet

1/3 What is a 13 Inch Rough in Toilet?

In the realm of bathroom renovations , the significance of a 13-inch rough-in toilet cannot be overstated. Its proper fit and avoidance of plumbing mishaps are paramount. However, the quest to find suitable alternatives can prove to be quite the challenge.

A seamless installation hinges upon accurately measuring the rough-in. Seek the expertise of a professional plumber to guarantee precise measurements. Familiarizing oneself with this concept is vital for selecting the ideal replacement and ultimately achieving a bathroom that functions flawlessly.

If you’re dealing with a bathtub drain leaking through the ceiling, you should definitely check out our article “Bathtub Drain Leaking Through Ceiling” to find out how to fix the issue and prevent any further damage.

How to Measure the Toilet Rough-In

Accurate measurements are key when determining the toilet rough-in. Utilize a measuring tape to gauge the distance from the wall to the center of the toilet flange. This precise measurement is essential to guarantee a proper fit and prevent any installation mishaps.

Be diligent in double-checking your measurement, as even a slight variation can result in an incorrect installation. If you feel uncertain about measuring or desire utmost accuracy, enlisting the services of a professional plumber is a wise decision. Their expertise ensures an exact measurement, granting you peace of mind and eliminating any uncertainties.

Remember, obtaining the correct rough-in measurement is crucial for a fully functional toilet. Take your time, utilize a measuring tape, and consider professional assistance if necessary. By doing so, you will achieve a seamless and trouble-free installation process.

13 inch rough in toilet

Comparison of Rough-in Sizes for Toilets: A Comparative Tabelle

Specification: Rough-in Size Advantages of 13 Inch Rough-in Toilets Advantages of 12 Inch Rough-in Toilets Advantages of 14 Inch Rough-in Toilets
13 Inch Fits perfectly in bathrooms with a 13 inch rough-in measurement, ensuring a seamless installation Can be used in bathrooms with a 12 inch rough-in measurement, providing flexibility in toilet selection Can accommodate bathrooms with a 14 inch rough-in measurement, allowing for easy installation
12 Inch Offers better clearance and more space compared to 12 inch rough-in toilets, ensuring comfort during use Enables more compact bathroom designs, especially in small spaces or when optimizing floor layout Provides additional space and comfort, making it suitable for larger bathrooms or for individuals with mobility needs
14 Inch Avoids potential installation challenges of using a 14 inch rough-in toilet, ensuring a straightforward setup Offers a wider range of toilet options and styles to choose from, providing greater design flexibility Provides greater flexibility in toilet placement, allowing for customization and adaptation to specific bathroom layouts

Choosing Between 12 Inch and 14 Inch Rough in Toilets

When faced with the choice between a 12 inch and 14 inch rough in toilet, there are a few crucial factors to consider. Firstly, take a moment to ponder your bathroom’s layout and the space available. Measure the distance between the wall and the toilet flange, as this will determine if a 13 inch rough in toilet is the ideal option for you.

Next, turn your attention to your plumbing setup. Depending on the location of your plumbing, either a 12 or 14 inch rough in toilet may be more suitable. It is crucial to ensure that your new toilet aligns correctly with your existing plumbing to avoid any future complications.

Lastly, seek out toilet models that are specifically designed for a 13 inch rough in. Although it may require some effort to find suitable replacement options, rest assured that there are still toilets available that will meet your requirements. Dedicate some time to research and discover a toilet that not only fits your rough in specifications, but also complements your personal style and preferences.

By taking these factors into account, you can confidently make an informed decision when choosing between a 12 inch and 14 inch rough in toilet.

All You Need to Know About 13 Inch Rough In Toilets

  • What is a 13 Inch Rough in Toilet?
  • Importance of Correct Rough-in Measurement
  • How to Measure the Toilet Rough-In
  • Challenges with a 13 Inch Rough in Toilet
  • Choosing Between 12 Inch and 14 Inch Rough in Toilets
  • Best Toilet Options for 13 Inch Rough in Toilet Replacement
  • Installation Tips for 13 Inch Rough in Toilet

Review: Kohler K-3949-0 for 13.5 Rough in Toilet Replacement

Step into the realm of bathroom perfection with the magnificent Kohler K-3949-0. This extraordinary toilet transcends the ordinary, offering a seamless blend of reliability, durability, and exquisite design that will elevate any bathroom to new heights of elegance. Prepare to be amazed by the effortless installation process of the Kohler K-3949-0.

Even if you have never ventured into the world of plumbing, fear not! With its user-friendly features and crystal-clear instructions, this toilet will be installed with ease, leaving you with ample time to revel in its magnificence. But the Kohler K-3949-0 exceeds expectations beyond its installation prowess.

Brace yourself for the impeccable performance it delivers. With its powerful flushing system, this toilet ensures the swift removal of waste, leaving no room for compromise. And fear not the guilt of water wastage, for the Kohler K-3949-0 has been crafted with a water-saving design that maintains its exceptional performance while conserving this precious resource.

In conclusion, the Kohler K-3949-0 stands tall as the epitome of excellence when it comes to replacing a 13.5 inch rough in toilet. Its unwavering reliability, enduring durability, sleek design, and user-friendly installation process make it the ultimate choice for those seeking perfection. Embrace the transformation and let the Kohler K-3949-0 grace your bathroom, offering not only a stunning aesthetic but also unparalleled performance.

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13 inch rough in toilet

How to Choose and Install the Perfect 13 Inch Rough-In Toilet

  1. Measure the distance between the wall and the center of the toilet flange to determine the rough-in measurement.
  2. If the rough-in measurement is 13 inches, choose a toilet specifically designed for a 13 inch rough-in.
  3. Purchase the selected toilet and gather all necessary tools for installation.
  4. Remove the existing toilet by shutting off the water supply, disconnecting the water line, and unscrewing the mounting bolts.
  5. Place a new wax ring on the flange and carefully lower the new toilet onto the wax ring, aligning it with the mounting bolts.

2/3 Installation Tips for 13 Inch Rough in Toilet

In the realm of toilet installations, there lies a secret to achieving perfection with a 13 inch rough in toilet . Remember these vital pointers: employ either a wax ring or gasket to forge an impenetrable seal , thus warding off any potential leaks. Before firmly fastening it into place, ascertain that the toilet is level .

Utilize a trusty level tool to guarantee its harmonious alignment with the floor. Lastly, conduct a thorough inspection of all connections, tightening them diligently to avert any leaks or loose fittings. By adhering to these invaluable tips, the installation of your 13 inch rough in toilet shall unfold seamlessly, culminating in triumphant success.

When it comes to buying a toilet, size matters. In this video, learn how to measure for a toilet and discover why a 13 inch rough in toilet might be the perfect fit for your bathroom.

YouTube video

Can I Use a 12 Inch Rough in Toilet on a 13 Inch Rough In?

When installing a toilet, it is crucial to consider the rough in measurements. Using a toilet with a rough in size of 12 inches on a 13-inch rough in can lead to compatibility problems. To avoid any issues, it is advisable to consult a professional plumber and carefully check the specifications of the toilet before installation.

Taking these steps will ensure a smooth and functional toilet experience.

If you’re curious about the minimum depth of a sewer line, check out our article on “What is the Minimum Depth of a Sewer Line” to find out all the important details.

13 inch rough in toilet

Toilet paper was first introduced in China in the 6th century, but it didn’t become widely popular until the 19th century.


My name is Warren and I am a professional plumber licensed and insured in the State of California. I have been in the business for over 10 years and have undertaken small and large projects including bathroom renovation, toilets, garbage disposals, faucets, sinks and kitchen plumbing jobs. This site is based on my experience with toilets. I have installed the best brands and models in all sizes and shapes. I hope this helps you with the unbiased information that you need to make the right decision. …weiterlesen

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In the quest for the ideal 13 inch rough in toilet , there are a few key considerations to bear in mind. Firstly, take into account the size of your bathroom and any spatial limitations. It’s essential to ensure that the toilet fits snugly and provides optimal comfort.

Equally significant is evaluating the advantages and disadvantages of different rough in sizes. While a 13 inch rough in may pose challenges when seeking replacement options, it does offer certain benefits. It is particularly well-suited for compact bathrooms and may be essential if your plumbing system is already configured for this specific rough in size.

During the installation of a new 13 inch rough in toilet, it is of utmost importance to steer clear of common pitfalls. One crucial step involves accurately measuring the rough in to guarantee a proper fit. Engaging the services of a professional plumber can prove invaluable in this regard, preventing any future plumbing complications.

Ultimately, the selection of a 13 inch rough in toilet necessitates thoughtful deliberation encompassing factors such as bathroom dimensions, plumbing configuration , and available replacement choices. By carefully weighing the pros and cons and sidestepping installation blunders, you will undoubtedly discover the perfect toilet to cater to your unique requirements.


In conclusion, this article provides a comprehensive guide to understanding and dealing with a 13 inch rough in toilet . We have discussed the importance of measuring the rough-in correctly and the challenges that come with a 13 inch rough in. We have also provided recommendations for the best toilet options for a 13 inch rough in toilet replacement, including a review of the Kohler K-3949-0.

Additionally, we have shared installation tips and answered common questions about this specific toilet measurement. This article has been designed to address the search intent of users looking for information on 13 inch rough in toilets and provides valuable insights and solutions. For more helpful articles on toilets and bathroom fixtures, we recommend exploring our other related content.


Do toilets come with 13 inch rough-in?

12½ or 13 inch toilets are not available. However, toilets with a 12-inch specification will be suitable for your 12-inch requirement. It’s important to note that while most 12-inch toilets have some flexibility and can accommodate slightly smaller measurements, not all of them do.

Can you use a 12 rough-in toilet for 13 rough-in?

You can consider the affordable option of using a 12-inch rough-in toilet, which will give you some additional space behind the toilet. Instead of relying on the provided slots, I installed a Unifit toilet by adding extra mounting holes. This was particularly useful for me because my rough-in measurement exceeded 13 inches, but the 12-inch Unifit toilet still worked perfectly for my needs. This approach was implemented on December 24, 2014.

Can I install a 12 inch toilet in a 14-inch rough-in?

If you have a 14″ rough-in for your toilet and you want to position the bowl 2″ further back, there is a specific method to achieve this. James expertly demonstrates this technique in an old Seattle home with a 14″ rough-in. On the left side, you can see a Toto Soiree toilet with a 14″ Unift, while on the right side, there is a Cadet 3 elongated bowl. Both toilets are suitable for a 12″ size, making them compatible options for your specific setup.

How common is a 14-inch rough-in toilet?

Out of the three standard rough-ins, the 12″ option is currently the most widely used. In the past, a 10″ rough-in was more common, but it is now mostly found in older homes. On the other hand, the 14″ rough-in is rarely seen. As someone who works at a plumbing supply house in the United States, I can confirm that the majority of our stocked toilets have a 12″ rough-in, and we do have a few 10″ options available as well.

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