What Size Are RV Toilets?

When embarking on an RV adventure, every inch of space matters. From the kitchen to the bedroom, each area is carefully designed to maximize comfort and functionality. One often overlooked yet crucial component of any RV is the toilet. The size of an RV toilet can significantly impact your travel experience, affecting both comfort and space efficiency. In this comprehensive guide, we’ll delve into the world of RV toilet sizes, exploring the various options available and helping you make an informed decision for your home on wheels.

RV toilets come in a range of sizes, each tailored to different needs and vehicle specifications. Whether you’re a weekend warrior or a full-time RVer, understanding the nuances of toilet sizes can make a world of difference in your journey. Let’s dive in and unravel the mysteries of RV toilet dimensions, from compact space-savers to luxurious full-size models.

1. The Importance of RV Toilet Sizes

Before we delve into specific measurements, it’s crucial to understand why toilet size matters in an RV:

1.1 Space Efficiency

In an RV, every square inch counts. The size of your toilet can significantly impact the overall layout and usability of your bathroom space. A well-chosen toilet size can help maximize floor space, allowing for better movement and potentially even additional storage options.

1.2 Comfort

While space efficiency is important, comfort shouldn’t be sacrificed. A toilet that’s too small can lead to discomfort, especially on longer trips or for larger individuals. Conversely, an oversized toilet in a compact RV might feel cramped and reduce overall bathroom functionality.

1.3 Water and Waste Management

Toilet size often correlates with bowl capacity and water usage. Larger toilets may offer more comfort but could require more frequent tank emptying. Smaller toilets might be more efficient in water usage but may need more frequent flushing.

1.4 Vehicle Weight Considerations

In RVing, weight is a critical factor. Larger toilets tend to be heavier, which can affect your vehicle’s overall weight distribution and fuel efficiency. This is particularly important for smaller RVs or those already near their weight limits.

2. Standard RV Toilet Sizes

RV toilets typically fall into three main categories based on size:

2.1 Compact RV Toilets

Dimensions:

• Height: 14-15 inches
• Width: 13-15 inches
• Depth: 15-16 inches
• Bowl Size: 9-10 inches in diameter

Compact RV toilets are designed for small spaces and are often found in pop-up campers, small travel trailers, and some Class B motorhomes. These toilets prioritize space-saving over comfort, making them ideal for occasional use or short trips.

Advantages:

• Space-efficient
• Lightweight
• Often more affordable

Disadvantages:

• Less comfortable for extended use
• Smaller bowl size may require more frequent cleaning

2.2 Mid-Size RV Toilets

Dimensions:

• Height: 17-19 inches
• Width: 15-18 inches
• Depth: 17-19 inches
• Bowl Size: 11-13 inches in diameter

Mid-size toilets strike a balance between comfort and space efficiency. They’re commonly found in medium-sized travel trailers, fifth wheels, and Class C motorhomes.

Advantages:

• More comfortable than compact models
• Still relatively space-efficient
• Suitable for most RV layouts

Disadvantages:

• May be too large for very small RVs
• Slightly heavier than compact models

2.3 Full-Size RV Toilets

Dimensions:

• Height: 19-21 inches
• Width: 18-20 inches
• Depth: 19-22 inches
• Bowl Size: 14-16 inches in diameter

Full-size RV toilets offer the closest experience to a residential toilet. They’re typically found in larger fifth wheels, Class A motorhomes, and luxury RVs.

Advantages:

• Maximum comfort
• Larger bowl size for easier use and cleaning
• Often feature residential-style flushing mechanisms

Disadvantages:

• Requires more space
• Heavier, which can impact vehicle weight limits
• May use more water per flush

3. Factors Influencing RV Toilet Size Selection

When choosing an RV toilet size, consider the following factors:

3.1 Available Space

Measure your RV’s bathroom area carefully. Consider not just the floor space but also vertical clearance and door swing. Remember to account for legroom and elbow room when seated.

3.2 User Preferences

Think about who will be using the toilet most frequently. If you’re traveling with taller individuals or those with mobility issues, a larger toilet might be more appropriate.

3.3 Trip Duration and Frequency

For weekend trips, a compact toilet might suffice. For full-time RVing or extended journeys, investing in a more comfortable, larger toilet could be worthwhile.

3.4 Water and Tank Capacity

Larger toilets often use more water per flush. Ensure your RV’s freshwater and black water tanks can accommodate your chosen toilet size, especially for boondocking or dry camping.

3.5 Installation Requirements

Some larger toilets may require modifications to your RV’s plumbing or flooring. Consider the complexity and cost of installation when choosing a size.

3.6 Vehicle Type and Weight Limits

Ensure the toilet’s weight aligns with your RV’s weight capacity. This is especially crucial for smaller RVs or those already near their Gross Vehicle Weight Rating (GVWR).

4. Specialized RV Toilet Sizes

Beyond the standard sizes, there are specialized RV toilets designed for specific needs:

4.1 Cassette Toilets

Dimensions vary but typically smaller than standard RV toilets:

• Height: 12-14 inches
• Width: 13-15 inches
• Depth: 15-17 inches

Cassette toilets feature a removable waste tank, making them ideal for smaller RVs or those without built-in black water tanks.

4.2 Composting Toilets

Dimensions can vary widely:

• Height: 19-22 inches
• Width: 18-21 inches
• Depth: 19-25 inches

Composting toilets are eco-friendly options that don’t require water or a black water tank. They’re often larger due to the composting chamber but can be a great option for boondockers.

4.3 Portable Toilets

Typically the smallest option:

• Height: 11-14 inches
• Width: 13-16 inches
• Depth: 14-17 inches

Portable toilets are great for small campers or as a backup option. They’re lightweight and can be easily moved.

5. Comparative Analysis of RV Toilet Sizes

To better understand the differences between RV toilet sizes, let’s look at a comparative table:

This table provides a quick reference for comparing the different sizes of RV toilets. As you can see, there’s a significant difference in dimensions and features across the size categories, each suited to different RV types and user needs.

6. Installation Considerations for Different RV Toilet Sizes

When installing an RV toilet, size plays a crucial role in the process. Here are some key considerations:

6.1 Floor Space

• Compact toilets: Require minimal floor modification, often fitting existing spaces.
• Mid-size toilets: May need minor adjustments to flooring or surrounding fixtures.
• Full-size toilets: Could require significant bathroom remodeling to accommodate larger dimensions.

6.2 Plumbing Connections

• Ensure the toilet’s waste outlet aligns with your RV’s black water tank inlet.
• Larger toilets may require stronger water pressure, potentially necessitating plumbing upgrades.

6.3 Door Clearance

• Measure your bathroom door’s swing arc to ensure it won’t hit the toilet.
• Consider sliding or pocket doors for very tight spaces.

6.4 Ventilation

• Larger toilets in small spaces may require improved ventilation to manage odors effectively.

6.5 Weight Distribution

• When upgrading to a larger toilet, consider its impact on your RV’s overall weight distribution.
• You may need to adjust other elements in your RV to maintain proper balance.

7. Maintenance and Cleaning Based on RV Toilet Size

The size of your RV toilet can affect its maintenance requirements:

7.1 Compact Toilets

• Require more frequent cleaning due to smaller bowl size
• May need more careful aim to prevent messes
• Often easier to access for deep cleaning

7.2 Mid-Size Toilets

• Balance between cleaning frequency and ease
• Standard cleaning tools usually suffice
• May require occasional deep cleaning of harder-to-reach areas

7.3 Full-Size Toilets

• Easier to keep clean due to larger bowl size
• May require more water and cleaning solution per cleaning session
• Could be more challenging to clean in tight RV bathrooms

8. Water Consumption and Tank Capacity Considerations

The size of your RV toilet directly impacts water usage and tank management:

8.1 Compact Toilets

• Typically use 0.5 to 1 pint per flush
• Ideal for conserving water and extending time between tank emptying
• May require more frequent flushing for solid waste

8.2 Mid-Size Toilets

• Usually use 1 to 1.5 pints per flush
• Offer a balance between water conservation and effective flushing
• Suitable for most RV tank capacities

8.3 Full-Size Toilets

• Can use up to 2 pints or more per flush
• Provide powerful flushing but consume more water
• May require more frequent tank emptying, especially in smaller RVs

9. Cost Implications of RV Toilet Sizes

The size of an RV toilet can significantly impact both initial and long-term costs:

9.1 Purchase Costs

• Compact toilets: Generally the most affordable, ranging from $100 to $300
• Mid-size toilets: Moderately priced, typically between $200 and $500
• Full-size toilets: Most expensive, often $400 to $1000 or more

9.2 Installation Costs

• Compact toilets: Usually the cheapest to install, often a DIY project
• Mid-size toilets: May require professional installation, especially if plumbing modifications are needed
• Full-size toilets: Potentially the most expensive to install, particularly if significant bathroom modifications are required

9.3 Operational Costs

• Larger toilets may increase water usage, potentially leading to higher campground fees or more frequent fill-ups
• Heavier toilets can slightly reduce fuel efficiency in your RV

9.4 Maintenance Costs

• Compact toilets might need more frequent repairs due to more intensive use
• Larger toilets may have more complex mechanisms, potentially leading to costlier repairs

10. Future Trends in RV Toilet Sizes

The RV industry is constantly evolving, and toilet designs are no exception. Here are some emerging trends:

10.1 Smart Toilets

• Compact smart toilets with features like automatic flushing and self-cleaning are becoming more common
• These may be slightly larger than traditional compact toilets but offer enhanced functionality

10.2 Modular Designs

• Some manufacturers are exploring modular toilet designs that can be customized to fit various spaces
• These could bridge the gap between different size categories

10.3 Eco-Friendly Options

• Increasing focus on water conservation may lead to more efficient designs across all size categories
• Composting toilets, which are typically larger, may become more compact and user-friendly

10.4 Accessibility Features

• As the RV community diversifies, expect to see more size options with accessibility features like higher seats or grab bars

FAQ Section

Q1: Can I replace my RV’s compact toilet with a full-size model?

A1: It’s possible, but you’ll need to consider several factors:

• Available space in your bathroom
• Your RV’s plumbing configuration
• Weight implications for your vehicle
• Potential need for bathroom remodeling

Always consult with a professional RV technician before making such a significant change.

Q2: Do larger RV toilets always use more water?

A2: Not necessarily. While larger toilets traditionally used more water, many modern full-size RV toilets are designed with water conservation in mind. Check the specifications of individual models for their water usage per flush.

Q3: Are there any legal requirements regarding RV toilet sizes?

A3: There are no specific legal requirements for RV toilet sizes. However, all RV toilets must meet certain safety and sanitation standards set by the Recreation Vehicle Industry Association (RVIA).

Q4: How do I measure my RV bathroom to ensure a new toilet will fit?

A4: Measure the following:

• Floor space where the toilet will be placed
• Distance from the back wall to the center of the waste outlet
• Height from floor to any overhead cabinets
• Width of the bathroom door and its swing arc

Always add a few inches of clearance on all sides for comfortable use.

Q5: Can I use a residential toilet in my RV?

A5: It’s not recommended. RV toilets are specifically designed to:

• Use less water
• Connect to RV-specific plumbing systems
• Withstand the movement and vibrations of travel
• Fit the limited space of an RV bathroom

Using a residential toilet could lead to plumbing issues, water waste, and potential damage to your RV.

Conclusion

Choosing the right size RV toilet is a crucial decision that impacts comfort, space efficiency, and overall travel experience. From compact models perfect for small campers to full-size options rivaling home bathrooms, there’s an RV toilet to suit every need and preference.

Remember, the ideal toilet size depends on various factors including your RV’s layout, your travel style, and personal comfort preferences. While compact toilets offer maximum space efficiency, mid-size options provide a balance of comfort and practicality. Full-size toilets, though luxurious, require more space and resources.