What to Do When RV Toilet Does not Hold Water

What To Do When RV Toilet Does Not Hold Water?


Yes, we get it, if your RV toilet doesn’t hold water, it’s a big issue. Normally when you’re done flushing the toilet, it holds a little bit of water to block out the bad odor. As a result, your RV doesn’t smell from the bad odor coming from the water tanks. 

So, how can you solve this stinky problem? And, what should you really do if your RV toilet does not hold water? 

Don’t worry, it’s not hard. In fact, we’ve compiled some simple methods in this article that’ll help you solve this problem. Moreover, we’ve even discussed what leads to this problem in the first place. Also, we’ve prepared some common questions in the end. They’ll clear your confusion about this problem even more. 

So, what are you waiting for? Let’s begin. 

What To Do When Your RV Toilet Doesn’t Hold Water?

The RV toilets aren’t like the ones in your home. As a matter of fact, you have to give special care behind them. 

Turns out, there could be a lot of reasons why RV toilets aren’t able to hold water. If you know the reasons why the problem takes place, you can take measures easily. Hence, you can minimize the chance of this problem happening too much in your RV. 

Why does the RV toilet fail to hold water? 

Before knowing the solutions to the problem, you should first know what leads to it in the first place. So, let’s have a look at what cause these toilets to not hold water:

1. Perished Blade Seal

80% of the time, a blade seal is a reason for your RV to not hold the water. This blade seal is a rubber seal that can get damaged or hardened at any point. As a result, it doesn’t work anymore and the toilet doesn’t hold water. 

2. Broken Water Valve

Your RV can face problems in holding water due to the water valves as well.But how do you know that it’s creating a problem? 

Well, it’s clearly evident when you flush and notice that water is running beyond a point. 

Also, what causes a broken water valve? Well, it happens due to some reasons: 

  • The water valve breaks due to the pieces getting frozen. 
  • The frozen pieces get thawed back later. 

Hence, make sure that you don’t park your RV in cold harsh weather. 

3. Broken Toilet Flange & Toilet Parts

Broken toilet flanges in an RV will create an effect on the stability of the toilet. As if that’s not enough, worn or broken toilet flanges also cause leakage in the toilet as well. 

In addition to this, if your RV toilet has worn or broken parts then it can cause problems as well. Moreover, these parts hold your toilet so you need to make sure that they’ve changed in years. 

Fixing the RV Toilet Seal 

By now, you should know that the rubber seals have a lot of importance in the RV toilet. If the seal gets hardened or damaged, it causes the toilet to not hold water anymore. So, how can you solve this problem? 

Well, you can easily replace the damaged blade seal. As a matter of fact, replacing them is a pretty straightforward job. However, improper repair of the toilets can lead to other problems. So, you need to be sure about what you’re doing. 

But, you shouldn’t worry as we’ve got your back. We’ll show you how you can install a new one and replace the damaged seal. Let’s begin: 


Before starting, make sure you have the right tool for your job. However, these tools aren’t expensive and are easily available anywhere. Let’s have a look: 

Step 1: Clean the Toilet and its Surroundings 

Before starting, clean the toilet. It’ll make things a bit more pleasant so you should definitely do it.

Step 2: Turn the Water Pump off

After this, make sure you turn off the water pump and the water supply. Moreover, make the clamp at the base of the toilet a little bit loose using the socket wrench. 

Step 3: Remove the Upper Portion of the Toilet

When you’re done loosening up the clamps of the toilet, lift it up. After that, put the toilet in the paper towel so that it doesn’t drip water on your RV floor. Also, don’t forget to put the used paper towels in the trash bag. 

Step 4: Remove the Damaged Seal

You’ll see the seal after you’ve removed the upper part of the toilet. Carefully remove the seal and put it in the trash bag. 

Step 5: Put the Purchased Seal 

After you remove the damaged seal, put the seal that you’ve purchased in the same place. However, make sure you gently apply pressure so that you don’t end up damaging it. Also, clean the surroundings as well. 

Step 6: Put Everything Back into its Place

Lastly, you need to put everything back into its place as it was before. Also, make sure that your toilet is straight. After you’re done, turn on the water supply and water pump. 

RV Toilet Does Not Hold Water – FAQs

Question: Is lubrication good for toilet seals? 

Answer: Yes, you can use them to tighten up the seals. 

Question: Is Vaseline good for rubber seals? 

Answer: No, rubber seals get damaged by Vaseline. 

Final Words

That’s all we have in store for you. Hopefully, now you know why your RV toilet does not hold water. Moreover, you even know the fixes to that problem. 

In the end, we’d like to add that if you look after the toilet parts in your RV, this problem won’t occur much more often. 

Also, if you’re not confident about installing the seal yourself, go get a plumber. They’ll do it easily. Good Luck. 

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