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A Step-by-Step Guide on How to Change an RV Toilet

Having a functional and comfortable toilet is essential for a pleasant RV experience.

Over time, you may find the need to change your RV toilet due to wear and tear, upgrading to a more efficient model, or personal preference.

In this article, we will walk you through the process of changing an RV toilet step-by-step, providing you with all the information you need to tackle this project confidently.

So, let’s dive in and learn how to change an RV toilet!

What You Will Need

Before embarking on your RV toilet replacement journey, gather the following tools and purchase a replacement RV toilet that suits your needs and preferences.


  • Adjustable wrench
  • Screwdriver
  • Pliers
  • Putty knife
  • Sealant gun
  • Teflon tape
  • Rubber gloves
  • Safety goggles

Replacement RV Toilet

  • Choose a toilet that fits the dimensions and specifications of your RV’s bathroom. Consider factors such as size, style, water usage, and durability to find the ideal replacement.


To ensure a smooth transition, it is important to prepare your RV and the existing toilet before starting the removal process.

Turn off the water supply

Before changing the RV toilet, locate the water shut-off valve and turn it off to prevent water flow. This valve is usually situated near the toilet or in the bathroom cabinet.

Empty and clean the existing toilet

To avoid any mess during the removal process, flush the toilet to empty the tank. Afterward, thoroughly clean the bowl, removing any debris or residue.

Removing the Old Toilet

Now that you’re prepared, it’s time to bid farewell to the old RV toilet.

Disconnecting the water supply line

Using an adjustable wrench or pliers, disconnect the water supply line from the toilet tank. Have a towel or bucket handy to catch any excess water that may spill out.

Removing the bolts securing the toilet

Locate the bolts attaching the toilet to the floor and use a screwdriver or wrench to remove the nuts. Keep in mind that some toilets may have caps covering the bolts, which you can remove by gently prying them off with a putty knife.

Lifting and removing the old toilet

With the bolts removed, carefully lift the old toilet straight up to detach it from the flange. Take caution as the toilet may be heavy, and it’s important to maintain balance to prevent any damage or spills. Once the toilet is lifted, set it aside in a safe place.

Preparing for Installation

With the old toilet out of the way, it’s time to prepare your RV for the installation of the new toilet.

Clean the flange and floor area

Inspect the flange, which is the pipe fitting that connects the toilet to the waste system, for any dirt, debris, or residue. Use a putty knife and a damp cloth to clean the flange and ensure it’s free from any obstructions. Additionally, clean the floor area around the flange to provide a clean and level surface for the new toilet.

Check the flange and replace if necessary

While cleaning the flange, inspect it for any signs of damage, such as cracks or corrosion. If you notice any issues, it’s crucial to replace the flange before proceeding with the installation. A damaged flange can lead to leaks and instability in the new toilet.

Installing the New Toilet

Now comes the exciting part – installing the brand new RV toilet!

Positioning the new toilet

Carefully position the new toilet over the flange, aligning the holes on the base of the toilet with the bolts protruding from the flange. Make sure the toilet is centered and sits flush on the floor. Take your time to ensure proper alignment for a secure and stable installation.

Securing the toilet with bolts

Once the toilet is in position, place washers and nuts onto the bolts and tighten them using a screwdriver or wrench. Start with hand-tightening to ensure the toilet remains level, and then use a tool to securely fasten the bolts. Be cautious not to overtighten, as it may damage the toilet or the flange.

Connecting the water supply line

Reconnect the water supply line to the toilet tank, ensuring it’s securely fastened. Use an adjustable wrench or pliers to tighten the connection. Before turning on the water supply, check that all the connections are tight and secure.

Testing and Finishing Up

Now that the new toilet is installed, it’s time to test its functionality and add the finishing touches.

Turning on the water supply

Turn on the water supply valve to allow water to flow into the toilet tank. Check for any leaks around the connections and ensure the water fills the tank properly. If you notice any leaks, tighten the connections or use Teflon tape to seal them.

Checking for leaks

After the tank is filled, flush the toilet and observe if there are any leaks around the base or other connections. If you notice any leaks, address them promptly to prevent water damage.

Sealing the toilet base

To provide an additional layer of protection against leaks and to secure the toilet to the floor, apply a bead of silicone or RV toilet sealant around the base of the toilet. Smooth out the sealant using your finger or a caulk smoothing tool for a neat and watertight seal.


Changing an RV toilet may seem like a daunting task, but with the right knowledge and tools, it is a manageable DIY project. By following the step-by-step guide provided in this article, you can confidently replace your RV toilet and enjoy a functional and comfortable bathroom in your mobile home. Remember to gather the necessary tools, prepare your RV, remove the old toilet, install the new one correctly, and test for leaks. With proper care and maintenance, your new RV toilet will serve you well for many adventures to come.


  1. How long does it take to change an RV toilet? The time required to change an RV toilet varies depending on your experience and the complexity of the installation. On average, it can take approximately 1-2 hours to complete the entire process.
  2. Can I install a residential toilet in my RV? It is not recommended to install a residential toilet in an RV. Residential toilets are designed for stationary homes and are not suitable for the unique plumbing and space limitations of an RV. It is best to choose an RV-specific toilet that is specifically designed for mobile use.
  3. What type of toilet is best for an RV? The best type of toilet for an RV depends on your preferences and needs. There are various options available, including gravity flush toilets, macerating toilets, composting toilets, and cassette toilets. Consider factors such as water usage, tank capacity, ease of installation and maintenance, and personal comfort when choosing the right toilet for your RV.
  4. Do I need any special tools to change an RV toilet? While basic tools like an adjustable wrench, screwdriver, and pliers are necessary for the toilet replacement process, there are no specialized tools required. However, it is always a good idea to have a putty knife, sealant gun, and safety goggles on hand for cleaning and sealing purposes.
  5. How often should I replace my RV toilet? The lifespan of an RV toilet can vary depending on usage and maintenance. However, on average, RV toilets can last anywhere from 5 to 10 years. Signs that it may be time for a replacement include frequent leaks, cracks, or damage that cannot be repaired.
  6. Can I change an RV toilet by myself, or should I hire a professional? Changing an RV toilet is a task that can be accomplished by most RV owners with basic DIY skills. With the right tools and following proper instructions, you can successfully replace the toilet yourself. However, if you are uncomfortable or unsure about the process, it is always recommended to seek professional assistance to ensure a proper installation.

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