why is my rv toilet wobbly

Why is My RV Toilet Wobbly : 8 Causes and Solutions Explained

When you are using your RV toilet, you may notice that it is wobbly. You may be wondering why my RV toilet is wobbly. It is necessary to ascertain the potential causes of the problem. This will enable you to make the necessary repairs to resolve the issue.

You need to act immediately if you notice that your RV toilet is wobbling. While it may seem like a minor issue, it can lead to more critical complications. We’ll explore some of the potential causes of a wobbly RV toilet, as well as some tips on how to fix the problem.

Why is My RV Toilet Wobbly : Potential Causes and Solutions

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Several factors may contribute to a wobbly RV toilet. To determine the cause of the problem, you need to investigate each possible cause. Remember that a wobbly commode may have more than one cause at a given time.

It will be discussed the possible causes and solutions may be for a wobbly RV toilet. It will assist you in resolving the issue as quickly as possible. Consequently, you can avoid potential leaks and other severe inconveniences.

1. Loose Bolts

One of the most common reasons for a wobbly RV toilet is that the bolts were not installed correctly. The bolts are responsible for securing the commode to the floor.

If the bolts are not tightened properly, they will not be able to provide a secure hold, resulting in a commode that wobbles when used. Over time the bolts can loosen further, making the problem even worse.

You should tighten the bolts, so they are snug but not too tight. The porcelain can crack if the bolts are too tight, which puts unnecessary stress on the material. To ensure that each bolt is properly tightened, you should inspect it closely.

The most effective way to check the tightness of the bolts is to use a torque wrench. This tool measures the force required to turn the bolt, which can help determine if it is too loose or too tight.

When the torque wrench indicates that the bolt is too loose, it should be tightened until it meets the recommended specifications.

2. Broken Flange

The flange is the part of the toilet that mounts it to the floor, and it is responsible for keeping the commode sturdy and stable. If the flange becomes damaged, cracked, or loose, it can cause the toilet to become unsteady and wobble when you sit on it.

In some cases, the flange may be completely broken, resulting in the commode detaching from the floor. To fix a broken flange, an entirely new one needs to be installed.

Changing a broken flange in an RV toilet is a simple process that anyone can do with a few tools and a little bit of know-how. You should first turn off the water supply to the toilet.

Next, you will need to loosen the bolts that secure the commode in place. Once the bolts are loose, you can remove the toilet from its position.

With the toilet removed, you can look at the flange to see if it is damaged. If it is, it is necessary to replace it with a new one. Simply loosen the flange bolt that holds the flange in place, and then remove the old flange.

When the new flange is in position, tighten the nuts to secure it. Before tightening the nuts, ensure that the new flange is level. Finally, you can reinstall the commode and tighten the bolts to ensure their stability.

3. Uneven Floors

If your RV is parked on an uneven surface, the toilet may wobble and become unsteady. When the RV is not level, the weight of the commode is not evenly distributed, which can lead to the toilet becoming loose over time.

Due to this reason, it is essential to ensure that your RV is level before you use the toilet. It is not always possible to do this, since some campsites are not level. You can use leveling blocks to level out your RV in these cases. Once your RV is level, the toilet should become more stable.

4. Damaged Wax Ring

Your RV toilet may be wobbly due to a damaged wax ring. The wax ring is a vital toilet component, forming a seal between the bowl and the drain pipe. This RV toilet seal prevents water from leaking and helps to keep sewer gas from entering your RV.

Over time, the wax ring can become damaged or brittle, causing it to lose its sealing ability. Consequently, your RV commode may become wobbly or leak.

It is necessary to disassemble the toilet to determine whether the wax ring needs to be replaced. Remove the bolts that secure the commode to the floor and then lift the toilet off of the flange.

Upon removing the toilet, the wax ring will be visible. If it is damaged, then you will need to replace it. It is relatively easy to replace a wax ring. To remove the wax ring, simply remove the nut, washer, and bolt.

You can replace the old wax ring with a new one once you have removed the old one. Be sure to line up the new wax ring’s holes with the flange’s holes. The final step is to replace the toilet and adjust the bolts that secure it to the floor.

5. Too Thick Wax Ring

You may be using a wax ring that is too thick for your RV toilet. When the wax ring is too thick, it can prevent the commode from sitting flush with the floor. Consequently, it turns into a rocking toilet over time.

It is essential to use a wax ring specially designed for RV toilets. These wax rings are thinner than standard wax rings, which allows them to create a proper seal without compromising the flushness of the toilet.

6. Weak Floor

The floor around your RV toilet may be weak or damaged. This is typically the case in older RVs. If the floor is not strong enough to support the weight of the toilet, then the toilet may become wobbly as time passes.

To resolve this issue, you will need to reinforce the floor surrounding the commode. The best way to do this is to install a support beam beneath the floor. It will provide additional support and prevent the commode from wobbling.

Installing a support beam requires drilling holes in the floor and securing the beam with bolts. Once the support beam is in place, your RV toilet should become more stable.

7. Broken Toilet Base

If you have a wobbly RV toilet, the most likely cause is a broken toilet base. The toilet’s base keeps it securely in place, so if it’s damaged, the commode will become loose. There are several ways that the toilet base can become damaged.

The most common cause is dropping something on the toilet, which can crack or break the base. Another common damage caused is using too much force when cleaning the toilet.

When you scrub the commode bowl with too much force can strain the base, causing it to crack or break. Epoxy can be used to repair a small crack in a toilet base, but if the base is broken, it must be replaced.

8. Loose Toilet Seat

Another common cause of a wobbly RV toilet is a loose toilet seat. The toilet seat is attached to the bowl with two bolts; over time, these bolts can become loose. As a result, the toilet seat will become loose and wobble.

To fix this issue, tighten the bolts that hold the toilet seat in place. You may need a wrench to tighten the bolts, but be careful not to overtighten them.

What Should You Do to Maintain Your RV Toilet Properly?

rv toilet foot pedal

You can maintain your RV toilet in several ways. It is important for both hygiene and comfort reasons. Here are a few tips to help you keep your RV commode in tip-top shape:

Clean the bowl and seat regularly. Use biodegradable cleaners specifically designed for RV toilets. These cleaners break down waste as well as prevent the development of odors.

Avoid using too much paper. This can clog the pipes and lead to serious problems. If possible, use recycled toilet paper or organic wipes. Empty and clean the holding tank regularly. Depending on the size of your RV and the amount of use, you may need to empty and clean it as often as once a week.

Inspect the seals and gaskets regularly. These keep water from leaking out of the commode, so it is important to ensure they are in good condition. Check the vent pipe regularly. As this allows air to flow into the holding tank, it is imperative that the opening is clear and not blocked.

Be sure to flush the toilet after each use. This will help to keep the bowl clean and prevent odors. Don’t put anything other than human waste. This includes feminine hygiene products, paper towels, and wipes.

Once a month, pour a cup of white vinegar into the bowl and let it sit for 30 minutes. This will help to remove any stubborn stains or buildup. Flush several times to rinse away the vinegar.

Related Article: How often do you put chemicals in your RV toilet?

Frequently Asked Questions:

There are a few frequently asked questions when it comes to RV toilets. Here are some of the most common questions and their answers:

1. How often should I clean my RV toilet?

How often should I clean my RV toilet

The frequency of cleaning will depend on factors such as how many people use the RV toilet and how often it is used. If the RV toilet is used frequently, then it is a good idea to clean the RV toilet at least once a week. Cleaning it every two weeks should be sufficient if used less frequently. This will help to prevent any odors or buildups.

2. Should I caulk around the base of my RV toilet?

It is not necessary to caulk around the base of the RV toilet. As the constant movement of the RV will cause the caulk to crack and break, it is not recommended. A foam floor toilet flange seal gasket is a better option since it is more flexible and can withstand RV movement. The result will be a more effective seal and a longer service life.

3. How often should I empty my RV toilet holding tank?

Based on the size of your RV’s black tank, you should be dumping it every 3-5 days or when the level reaches two-thirds or three-quarters full. If you dump this frequently, you reduce the likelihood of waste buildup that could cause clogs, misreading of sensors or odors. This is an integral part of maintaining your RV toilet.


After reading this article, we hope you have found a clear answer to your question, “why is my RV toilet wobbly?”. Keep these potential causes in mind when you feel a wobble in your RV toilet.

Inspect your toilet thoroughly to determine if these causes contribute to the problem. If you have identified the cause of the problem, follow the instructions we provided for resolving it.

Proper care and maintenance of your RV toilet will help prevent these problems from happening in the first place. If you follow the tips we provided, your RV toilet will remain in good condition for a long time.

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