Replacing an RV toilet might sound intimidating, but I found the job far simpler than expected. With the right tools, a bit of patience, and a willingness to get a little hands-on, the whole process took me under an hour. Whether your RV toilet is cracked, leaking, outdated, or just uncomfortable, upgrading it can make your travels a lot more enjoyable.
Learning how to replace an RV toilet is one of those must-have skills for long-term travelers. Not only can it save you a costly trip to the service shop, but it also gives you more confidence handling the small maintenance jobs that come with owning an RV. I’ll take you step-by-step through the tools you’ll need, how to remove your old toilet, install a new one, and test it properly before hitting the road again.
This guide will walk you through everything I did so you can confidently take on the project yourself.
Signs Your RV Toilet Needs Replacing
Before diving into how to replace an RV toilet, it’s helpful to recognize when it’s truly time to install a new one. Mine had started leaking around the base after flushing, and I noticed an odor that wouldn’t go away, even with thorough cleaning.
Other signs that suggest replacement:
- Persistent leaks from the base or valve
- A cracked bowl or seat
- Trouble flushing or filling
- A worn-out seal that no longer holds water
- Outdated style or lack of comfort features
If you’re experiencing any of these problems, it might be more efficient to swap out the old unit than to keep patching it.
Tools and Supplies You’ll Need
Replacing an RV toilet doesn’t require anything fancy. I gathered everything I needed beforehand to avoid mid-project trips to the hardware store.
Here’s what I used:
- Replacement RV toilet
- Adjustable wrench or socket set
- Flathead screwdriver
- New flange seal (usually included with a new toilet)
- Rubber gloves
- Disposable rags or paper towels
- Bucket with water and disinfectant
- Teflon tape (optional but useful for water line fittings)
- Cleaning supplies
Once I had these ready, it was time to get started.
Step 1: Drain and Disconnect the Water System
The first thing I did was shut off the water supply to the toilet. Depending on your RV’s setup, that could be done at the main water valve or with a local shutoff valve if one is installed behind the toilet.
I then flushed the toilet to remove most of the water from the bowl and tank. A towel came in handy to soak up any leftover water in the lines and around the seal.
If you’re on city water hookup or using a water pump, make sure to turn both off. Disconnect the RV’s water supply entirely before continuing.
Step 2: Remove the Old Toilet
With the water off and the toilet mostly dry, I used a wrench to remove the two bolts at the base of the toilet that held it to the floor. Some RVs might have caps covering the bolts just pop them off with a screwdriver.
Once the bolts were out, I lifted the toilet carefully. It might require a little rocking motion to break the seal if it’s been in place for a while. I made sure to wear gloves at this stage, since there’s always some residual water or grime under the unit.
After removing the toilet, I placed it in a garbage bag or an outdoor area to avoid making a mess inside.
Step 3: Clean the Area and Inspect the Flange
Before installing the new toilet, I checked the flange the part where the toilet connects to the floor and sewer line. I made sure it wasn’t cracked or loose. If it had been damaged, I’d have needed to replace it too.
I cleaned the flange area with disinfectant and a rag. Removing old wax, dirt, or seal remnants helped ensure a proper connection with the new seal.
This part might not be glamorous, but it made a big difference in making the new toilet installation solid and leak-free.
Step 4: Install the New Flange Seal
Most RV toilets come with a new rubber or foam flange seal. I placed the new seal (often called a closet flange seal or gasket) directly over the flange on the floor. The seal provides the watertight connection between the toilet base and the sewer pipe.
Depending on your RV model and toilet brand, the seal may be placed on the bottom of the toilet itself or directly on the flange. I followed the instructions included with the toilet to avoid confusion.
Once the seal was in place, I was ready to set the new toilet.
Step 5: Install the New Toilet
This part required a bit of care to ensure a good fit. I lifted the new toilet and gently aligned it over the flange bolts. It’s important to lower it straight down to avoid shifting the seal.
Once aligned, I hand-tightened the nuts onto the bolts to secure the toilet. Then I used a wrench to give it a snug fit. I made sure not to over-tighten, as RV toilet bases are usually made of plastic and can crack if forced.
The toilet felt solid and didn’t wiggle. That was a good sign that everything was seated properly.
Step 6: Reconnect the Water Supply
With the toilet mounted, I reattached the water line using my wrench and some Teflon tape on the fitting to ensure a leak-proof connection.
I turned the water supply back on and listened carefully for any sounds of dripping. No leaks meant it was time to test the flush.
After a few test flushes and a check under the base for leaks, I was confident everything was working as it should.
Step 7: Final Touches and Cleanup
I replaced the bolt covers at the base of the toilet and cleaned the area one more time. Installing a new toilet might not seem like the most glamorous project, but having a fresh, clean, fully functional unit makes a big difference in daily comfort.
Now I could get back on the road knowing the job was done right and without a plumber’s bill.
Top RV Toilet Brands to Consider
When I first started looking into how to replace an RV toilet, I quickly realized not all toilets are the same. Some are high-profile like a residential toilet, while others are low-profile for compact bathrooms.
Here are a few of the top brands I recommend:
Thetford Aqua-Magic V
This toilet is lightweight, easy to install, and offers both foot-pedal and hand-flush options depending on the model. It’s a great option for RVers who want a straightforward replacement without fuss.
Dometic 310 Series
If you’re looking for a ceramic bowl with a more residential feel, this is a solid choice. It’s a bit heavier but feels sturdier and is easier to clean than plastic models.
Aqua-Magic Style II
This upgraded version of the Aqua-Magic line gives you a higher profile, more comfortable seat, and ceramic bowl with an RV-friendly footprint.
Tips for a Smoother Installation
Here are a few tips I learned that made replacing my RV toilet even easier:
- Take a photo of your old installation before removal for reference.
- Check for any manufacturer-specific install guides in your new toilet box.
- Don’t throw away the old toilet until the new one is installed. You might need a part or want to compare measurements.
- Keep a towel handy to soak up drips during water line reconnection.
- Test for leaks at the base and connection points after installation.
When to Call a Professional
Although I handled this project solo, there are some cases where you might want help. If your flange is cracked, the plumbing system is damaged, or you’re dealing with a composting or macerating toilet replacement, it may be worth contacting an RV technician.
That said, most standard RV toilets are designed for easy do-it-yourself swaps.
Final Thoughts
Now that I know how to replace an RV toilet, I feel a lot more capable when it comes to other RV maintenance tasks. The upgrade made my RV bathroom feel cleaner and more comfortable, and I didn’t need any special tools or plumbing experience to get the job done.
Whether you’re fixing a leak, upgrading to a ceramic bowl, or just tired of that old squeaky seat, replacing your RV toilet is well within reach. With the right toilet and a little prep, the process can be painless and surprisingly fast.
If you’ve been wondering how to replace an RV toilet, this guide should help you tackle the job confidently. It’s a great weekend project with real benefits just don’t forget the rubber gloves.