Are All RV Toilets the Same Size?

Naomi O'Colman

Updated on:

Are All RV Toilets the Same Size

The toilet in your Rv may not have the same size as those in other RVs. This can cause problems when you want to replace your RV toilet with a better replacement. Are all RV toilets the same size?

The short answer is no. All RVs are not the same, even in size. The toilets that fit one RV will not fit another. This includes the height, weight and width of your toilet.

If you are planning to replace your toilet with a better model, read the specifications first. You may have to buy a new one or get help from a plumber if you don’t have the right dimensions in place for installing the new model.

What is an RV toilet?

An RV toilet, also known as a recreational vehicle toilet or motorhome toilet, is a specialized toilet designed for use in recreational vehicles (RVs), such as campers, motorhomes, travel trailers, or caravan-style mobile homes. These toilets are specifically designed to address the unique challenges of waste disposal and water usage in a mobile environment.

RV toilets differ from traditional residential toilets in several ways. Here are some key features and considerations of RV toilets:

  • Size and Space: RV toilets are generally more compact and space-efficient compared to residential toilets. They are designed to fit within the limited interior space of an RV while providing sufficient comfort for users.
  • Water Usage: RV toilets typically use less water than traditional toilets. Since water supply on an RV is limited, water conservation is essential. RV toilets often have adjustable flushing mechanisms to control the amount of water used per flush.
  • Holding Tanks: RV toilets are connected to a holding tank system responsible for storing and containing the waste until it can be properly disposed of at an appropriate dumping station. These holding tanks are designed to be easily emptied and cleaned.
  • Flush Mechanism: RV toilets may have different flushing mechanisms. Some RV toilets use a gravity-flush system similar to residential toilets, while others utilize a foot pedal or hand pump to conserve water and control flushing.
  • Waste Management: Waste from the RV toilet is typically stored in a dedicated black water tank. This tank is separate from the freshwater and gray water tank (which holds wastewater from sinks and showers). It is important to properly maintain and empty the black water tank to ensure hygiene and prevent odors.
  • Chemical Treatments: Many RV owners use specialized chemical treatments designed for RV toilets to control odors and break down waste. These treatments are added to the toilet bowl or holding tank to aid in waste decomposition and odor control.
  What Happens if The Coolant Is Low?

RV toilets are designed to provide convenient and hygienic sanitation facilities while accommodating the limited resources and space available in recreational vehicles. They allow travelers and RV enthusiasts to have access to toilet facilities on the go, making RV living and camping more comfortable and self-sufficient.

Click here to see top rated RV toilets on Amazon

Understanding RV Toilet Sizes – Factors Influencing Rv Toilet Sizes

Space Limitations in RVs

One of the primary considerations when designing an RV toilet is the limited interior space within the recreational vehicle. RV manufacturers must optimize space usage to provide functional and comfortable toilets while still allowing for other essential features and amenities in the RV. This often results in the need for compact and space-saving toilet designs.

Plumbing Requirements

RV toilets need to be compatible with the plumbing system of the RV. The toilet size must align with the available plumbing connections, such as the size and placement of the waste pipe and water supply lines. Plumbing considerations also include factors like venting and drainage systems, which can impact the toilet’s dimensions and installation requirements.

User Comfort and Ergonomics

While space limitations are a crucial factor, RV manufacturers strive to provide a level of comfort and ergonomics in the toilet design. The toilet should be functional and comfortable for users, allowing for easy and convenient use. This includes considerations like seat height, seating area dimensions, and user-friendly features such as handles or foot pedals for flushing.

Balancing these factors can be challenging, as RV manufacturers aim to maximize the available space while providing a comfortable and functional toilet experience. The size of RV toilets may vary between different RV models and manufacturers, ranging from smaller compact toilets to slightly larger models that offer more seating area and legroom.

RV owners need to consider their specific needs and preferences when selecting an RV with an appropriately sized toilet.

Standard RV Toilet Sizes

While there isn’t a universally standardized size for RV toilets, there are common dimensions that are often referred to as standard sizes.  These standard sizes are widely used in the RV industry and provide a general idea of the dimensions you can expect for an RV toilet.

Standard RV Toilet Size

  • Length: The length of a standard RV toilet typically ranges from around 18 inches (45 cm) to 20 inches (50 cm).
  • Width: The width of a standard RV toilet usually falls between 13 inches (33 cm) and 15 inches (38 cm).
  • Height: The height of a standard RV toilet is generally between 15 inches (38 cm) and 18 inches (45 cm).

Pros of Standard-Sized RV Toilets

  • Space Efficiency: Standard-sized RV toilets are designed to maximize space efficiency within the limited interior dimensions of an RV. They offer a balance between functionality and conserving valuable space.
  • Compatibility: Their widespread use makes standard-sized RV toilets generally compatible with common RV plumbing systems, making installation and replacement easier.
  • Availability: Replacement parts and accessories for standard-sized RV toilets are readily available in the market, making maintenance and repairs more convenient.
  Do Car Alarms Stop on Their Own?

Cons of Standard-Sized RV Toilets

  • Limited Seating Area: The compact dimensions of standard-sized RV toilets may result in a smaller seating area, which might be less comfortable for some users, especially those with larger body frames.
  • Reduced Legroom: The dimensions of standard-sized RV toilets might restrict legroom, potentially causing discomfort for taller individuals.
  • Individual Preferences: Some RV owners may have specific preferences for larger or more spacious toilets, and standard-sized options might not meet their requirements.

Compact RV Toilets

Compact RV toilets are designed specifically for RVs and motorhomes with limited space. These toilets are smaller in size compared to standard residential toilets and are optimized to fit within the compact interiors of recreational vehicles.

Compact RV Toilets Overview

Compact RV toilets are designed with space efficiency in mind. They are generally smaller in length, width, and height compared to standard toilets, allowing them to fit into tight spaces commonly found in RV bathrooms. Despite their smaller size, they still provide the necessary functionality and sanitation features required for a comfortable toilet experience.

Advantages of Compact RV Toilets

  • Space Optimization: The primary advantage of compact RV toilets is their ability to maximize space within the limited confines of an RV bathroom. They allow RV owners to utilize the available space more efficiently, leaving room for other essential amenities or storage areas.
  • Easy Installation: Due to their smaller size, compact RV toilets are often easier to install in RVs compared to larger toilets. They require less clearance and are more flexible when it comes to plumbing connections.
  • Weight Reduction: Compact toilets are generally lighter in weight than standard-sized toilets. This can be advantageous for RVs, as reducing weight contributes to improved fuel efficiency and easier maneuverability.

Factors to Consider When Choosing a Compact RV Toilet

  • Size and Dimensions: Consider the available space in your RV’s bathroom and ensure that the compact toilet you choose will fit properly without compromising comfort or functionality. Measure the area where the toilet will be installed and compare it with the dimensions of the compact toilets you are considering.
  • Comfort: Compact toilets may have a smaller seating area and reduced legroom compared to standard-sized toilets. Take into account your personal comfort preferences and consider whether the dimensions of the compact toilet will be suitable for your needs.
  • Features and Functionality: Check the features and functionality of the compact toilet, such as flushing mechanism, water usage, and waste disposal system. Ensure it meets your requirements and offers convenience and hygiene features.
  • Quality and Durability: Look for compact RV toilets from reputable manufacturers known for producing high-quality products. Consider the durability and longevity of the toilet, as it will be subjected to the unique challenges of RV travel and usage.
  • User Reviews and Recommendations: Read reviews and seek recommendations from other RV owners with compact toilet experience. Their insights can provide valuable information and help you make an informed decision.

Large RV Toilets

Large RV toilets are designed to provide a more spacious and comfortable toilet experience within recreational vehicles. These toilets have larger dimensions compared to standard or compact RV toilets, offering a more generous seating area and increased legroom.

They are particularly suited for individuals who prefer a more expansive toilet space or those with larger body frames.

Benefits of Larger Toilets in RVs

  • Enhanced Comfort: The larger dimensions of these toilets provide more space for users, allowing for a more comfortable seating position and increased legroom. This can be particularly beneficial for taller individuals or those who prefer a roomier toilet experience.
  • Similarity to Residential Toilets: Large RV toilets often resemble traditional residential toilets in terms of size and design. This familiarity can make them more appealing to individuals accustomed to residential bathrooms.
  • Accessibility and Ease of Use: The additional space in large RV toilets can make them more accessible and user-friendly, especially for individuals with mobility issues or those who require additional assistance while using the toilet.
  • Flexibility in Installation: Large RV toilets still need to fit within the available space in an RV bathroom, but their larger size can offer more flexibility during installation. This allows for easier connection to plumbing systems and potentially greater customization options.
  Fuel Pump Relay Symptoms:Troubleshooting & Repair Guide For Beginners

Considerations When Opting for a Large RV Toilet

  • Space Constraints: Ensure that your RV bathroom has enough space to accommodate a larger toilet without compromising other essential features or maneuverability within the bathroom area. Measure the available space carefully and compare it with the dimensions of the large RV toilets you are considering.
  • Weight and RV Capacity: Large toilets are generally heavier than smaller options. Consider the weight capacity of your RV and the impact of adding a larger toilet to the overall weight. Ensure that the RV’s structure and systems can support the additional weight.
  • Plumbing Compatibility: Verify that the plumbing connections in your RV, such as the waste pipe and water supply lines, are compatible with the larger toilet’s dimensions. Check the location of these connections and ensure that they align with the requirements of the large toilet you plan to install.
  • Cost: Large RV toilets may come at a higher price point compared to smaller options. Factor in your budget and determine whether the benefits of a larger toilet justify the increased cost for your specific needs.

Customized RV Toilets

Customized RV toilets refer to toilets that are specifically tailored to meet the unique layouts and needs of individual recreational vehicles (RVs). These toilets are designed to fit seamlessly within the available space and complement the overall design and functionality of the RV bathroom.

Tailoring Toilets to Specific RV Layouts and Needs

Customized RV toilets are created by manufacturers or specialized RV outfitters who understand the intricacies of RV design and can adapt toilets to match specific requirements. Here’s an overview of how customization can be applied:

  • Size and Dimensions: Customized RV toilets can be designed to fit within the available space of the RV bathroom, taking into account the specific dimensions and layout constraints. This ensures a perfect fit and optimizes space usage.
  • Plumbing Compatibility: Manufacturers can customize the toilet’s plumbing connections to align with the RV’s existing plumbing system. This ensures proper installation and functionality, as well as minimizing the need for extensive modifications.
  • Styling and Aesthetics: Customized RV toilets can be designed to match the overall aesthetic and design theme of the RV interior. This includes options for different colors, finishes, and materials to seamlessly integrate with the rest of the bathroom décor.

Examples of Customized RV Toilets on the Market

  • Custom Toilet Sizes: Some RV toilet manufacturers offer customization options to modify the dimensions of their standard models to fit specific RV layouts. This allows RV owners to order toilets that are tailored to their specific bathroom dimensions and available space.
  • Integrated Storage: Customized RV toilets can feature built-in storage compartments or cabinets, making use of every inch of available space in the bathroom. These toilets may include shelves or compartments for storing toiletries, cleaning supplies, or other bathroom essentials.
  • Folding Toilets: In RVs with extremely limited space, folding toilets can be customized to save space when not in use. These toilets are designed to fold up or collapse, allowing for additional floor space in the bathroom when the toilet is not needed.
  • Swivel Toilets: Swivel toilets are designed to rotate or swivel to a certain degree, allowing for greater flexibility in positioning within the RV bathroom. This customization can provide more convenient access or accommodate specific bathroom layouts.
  How to Clean Fuel Injectors Without Removing Them

When considering a customized RV toilet, consulting with manufacturers, RV outfitters, or professionals who specialize in RV customization is essential. They can guide you through the process, offer insights, and provide options based on your specific RV layout, needs, and preferences.

Comparison to Home Toilets

Contrasting RV Toilets with Traditional Home Toilets

RV toilets and traditional home toilets differ in several ways due to the unique requirements and constraints of RVs. Here are some key differences between the two:

  • Size and Space Considerations: RV toilets are generally smaller and more compact than traditional home toilets. This is to accommodate the limited space available in RV bathrooms and optimize overall RV layout and functionality.
  • Water Usage: RV toilets are designed to conserve water since freshwater availability is limited in RVs. They often incorporate water-saving features such as low-flow flushing mechanisms or dual-flush options to minimize water usage per flush. In contrast, traditional home toilets typically have higher water capacities and may use more water per flush.
  • Plumbing System: RV toilets are specifically designed to connect to the plumbing system of an RV, which operates differently from home plumbing systems. RV toilets may have specialized fittings, connections, or waste management systems to accommodate the RV’s plumbing setup.
  • Portability: RV toilets are designed to be portable and self-contained within the RV. They are often equipped with a waste tank that can be emptied at designated dump stations. In contrast, home toilets are permanently connected to a sewage system and do not require manual waste disposal.
  • Stability and Durability: RV toilets are engineered to withstand the vibrations and movements associated with RV travel. They are designed to be securely mounted to the RV floor to ensure stability. Home toilets, on the other hand, are installed permanently and do not need to withstand transportation-related stresses.

Factors to Consider when Transitioning from Home to RV Toilets

  • Space Constraints: RV toilets are smaller and may require some adjustment if you are used to a larger, more spacious toilet in your home. Consider the dimensions and layout of your RV bathroom and how it will affect your comfort and convenience.
  • Water Usage: Be mindful of the limited water supply in your RV. Adjusting to using less water per flush and adopting water-saving habits can help conserve water during your RV travels.
  • Waste Disposal: Familiarize yourself with the proper waste disposal procedures for RV toilets. Understand where and how to access dump stations and follow local regulations for responsible waste disposal.
  • Maintenance and Cleaning: RV toilets may require more frequent cleaning and maintenance compared to home toilets due to their compact size and limited water usage. Be prepared to incorporate regular cleaning routines into your RV lifestyle.
  • Adaptation Period: It may take some time to adjust to the differences in size, functionality, and water usage of RV toilets. Give yourself time to acclimate to the changes and find a routine that works for you.

Common misconceptions about RV toilets

There are several common misconceptions about RV toilets that can lead to misunderstandings or false assumptions.

  • RV Toilets are the same as Portable Camping Toilets: One common misconception is that RV toilets are the same as portable camping toilets. While both serve the purpose of providing toilet facilities in outdoor settings, RV toilets are specifically designed for use in recreational vehicles. They are often permanently installed and connected to the RV’s plumbing system, while portable camping toilets are stand-alone units that require manual waste disposal.
  • RV Toilets are Uncomfortable: Some people assume that RV toilets are uncomfortable due to their smaller size or different design. However, modern RV toilets are designed with user comfort in mind. While they may be more compact than home toilets, manufacturers strive to provide ergonomic seating positions and comfortable features to ensure a pleasant experience.
  • RV Toilets are Smelly: Another misconception is that RV toilets are inherently smelly. While it’s true that improper use or neglecting maintenance can result in unpleasant odors, properly maintained RV toilets should not be smelly. Regular cleaning, using appropriate tank treatments, and following waste disposal guidelines can help keep RV toilets odor-free.
  • RV Toilets Always Use a Lot of Water: While older RV toilets may have used a significant amount of water per flush, modern RV toilets are designed with water-saving features. They incorporate technologies such as low-flow flushing mechanisms, dual-flush options, or vacuum flush systems to minimize water usage. RV owners can also adopt water-saving practices, such as only flushing when necessary, to further conserve water.
  • RV Toilets are Difficult to Install or Replace: Installing or replacing an RV toilet may seem daunting, but it is typically a straightforward process. Many RV toilets are designed for easy installation, and instructions are provided by the manufacturer. Additionally, there are resources available, such as online tutorials or RV service professionals, to assist with the installation or replacement if needed.
  Timing Belt Vs Serpentine Belt: The Differences

It’s important to dispel these misconceptions to ensure accurate information about RV toilets. By understanding the features, maintenance requirements, and proper usage of RV toilets, users can enjoy a comfortable and functional bathroom experience while on their RV adventures.

Frequently Asked Questions

Are all RV toilets the same size?

No, RV toilets come in various sizes to accommodate different RV models and bathroom layouts. While there are standard sizes, there can be variations in dimensions and shapes among different RV toilet models.

What is the average size of an RV toilet?

The average size of an RV toilet can vary, but a common size range is around 17 to 19 inches in height, 13 to 15 inches in width, and 17 to 20 inches in depth. These measurements are approximate and can differ depending on the specific toilet model.

Can I replace my RV toilet with a larger one?

In many cases, it is possible to replace your RV toilet with a larger one, provided there is enough space available in your RV bathroom to accommodate the larger size. However, it’s essential to consider the plumbing connections, mounting requirements, and overall compatibility with your RV’s plumbing system before making a replacement.

Are there RV toilets suitable for small spaces?

Yes, there are RV toilets specifically designed for small spaces. Compact RV toilets are available in smaller dimensions to fit RV bathrooms with limited space. These toilets offer space-saving features while still providing the necessary functionality and comfort.

How do I measure the dimensions of my RV toilet?

To measure the dimensions of your RV toilet, you can follow these steps:

  • Height: Measure from the floor to the top edge of the toilet seat or the highest point of the toilet.
  • Width: Measure the widest part of the toilet, typically across the backrest area or the widest point of the bowl.
  • Depth: Measure from the front edge of the toilet to the back, considering the overall depth of the toilet.
  How To Keep RV Bumper Caps On?

When measuring, be mindful of any obstructions or protrusions that may affect the dimensions, such as water supply connections or nearby walls. These measurements will help you determine the size requirements when choosing a replacement or assessing the compatibility of a new toilet for your RV bathroom.

What are the weight considerations for RV toilets?

RV toilets are designed with weight considerations in mind, as RVs have specific weight limits and restrictions. RV toilets are typically made from lightweight materials such as plastic or ceramic to minimize the overall weight of the RV. Manufacturers take into account the weight of the toilet and its components to ensure it aligns with the weight capacity of the RV and doesn’t exceed the recommended limits.

Can I install a residential toilet in my RV?

In most cases, it is not recommended to install a residential toilet in an RV. Residential toilets are designed for use in permanent structures with standard plumbing systems and are not suitable for the unique requirements of an RV. Residential toilets are typically heavier, larger, and may not have the necessary plumbing connections or mechanisms for waste management in an RV setting. It is best to choose an RV-specific toilet that is designed and approved for use in recreational vehicles.

Are compact RV toilets comfortable to use?

The comfort level of compact RV toilets can vary depending on the specific model and individual preferences. While compact RV toilets are designed to save space in the bathroom, they still aim to provide adequate comfort for users. Some compact RV toilets feature ergonomic designs, molded seating, or adjustable seat heights to enhance user comfort. It’s recommended to read reviews and consider personal comfort needs when choosing a compact RV toilet.

What are the benefits of a larger RV toilet?

A larger RV toilet can provide several benefits. Firstly, a larger toilet bowl can offer increased comfort and ease of use. It allows for more room and maneuverability while sitting. Additionally, a larger toilet may provide a more familiar experience for individuals accustomed to standard home toilets. It can also accommodate users with specific needs, such as individuals with mobility issues or disabilities, by providing more space and stability.

Can I customize the height of an RV toilet?

In some cases, the height of an RV toilet can be customized to suit individual needs. Aftermarket products, such as toilet seat risers or height-adjustable toilet bases, can be added to the existing toilet to increase its height. These modifications can be beneficial for individuals who require a higher seating position or have difficulty getting on and off a standard-height toilet.

However, it’s important to ensure that any modifications comply with RV safety standards and do not compromise the stability or integrity of the toilet or RV structure. When considering height customization for an RV toilet, consulting with RV professionals or seeking manufacturer recommendations is advised.


In conclusion, not all RV toilets are the same size. RV toilets come in various sizes, including standard, compact, large, and even customized options. Factors such as space limitations, plumbing requirements, and user comfort play a crucial role in determining the appropriate toilet size for your RV.

Consider your specific needs, available space, and desired features when choosing an RV toilet. Whether you opt for a standard-sized toilet, a compact model, or a customized solution, prioritize comfort, functionality, and compatibility with your RV’s layout.

By understanding the different sizes and features available, you can select the perfect RV toilet that suits your requirements, ensuring a pleasant and convenient bathroom experience during your RV adventures.

Click here to see top rated RV toilets on Amazon