Skip to content

RV Toilet Won’t Stop Running

Having an RV is a great way to explore the open road and experience the freedom of traveling.

However, like any other vehicle, RVs require regular maintenance and occasional repairs.

One common issue that RV owners may encounter is a toilet that won’t stop running.

This can be frustrating and inconvenient, but fear not!

In this comprehensive guide, we will delve into the topic of RV toilets that won’t stop running.

We’ll provide you with valuable insights, troubleshooting tips, and effective solutions to help you resolve this problem and get back to enjoying your RV adventures.

RV Toilet Won’t Stop Running: Understanding the Problem

Before we dive into the troubleshooting process, let’s first understand why an RV toilet may continue to run even after flushing.

The most common causes include faulty components, water pressure issues, or a malfunctioning flush valve.

By identifying the underlying cause, you can take appropriate steps to fix the problem and restore your toilet to its normal functioning state.

Troubleshooting RV Toilet Won’t Stop Running

Inspect the Water Supply

To begin the troubleshooting process, check the water supply to your RV toilet.

Ensure that the water supply valve is fully open and providing a steady flow of water.

In some cases, a partially closed valve can result in a continuous running toilet.

If the valve is closed or partially closed, open it fully and observe if the issue persists.

Check the Flush Valve

The flush valve is responsible for regulating the water flow during flushing.

If the flush valve is not functioning correctly, it can cause the toilet to continue running.

Start by removing the tank lid and inspecting the flush valve.

Look for any signs of damage or debris that may be obstructing its proper operation.

Clean the valve thoroughly and ensure it moves freely.

Examine the Flapper Seal

The flapper seal is another critical component that can contribute to a running toilet.

Over time, the flapper seal may become worn out or misaligned, preventing it from creating a proper seal.

This can lead to water continuously flowing into the toilet bowl.

Inspect the flapper seal for signs of wear and tear, and replace it if necessary.

Adjust the Fill Valve

The fill valve controls the water level in the toilet tank.

If the fill valve is set too high, it can cause an overflow, resulting in a constantly running toilet.

To adjust the fill valve, locate the adjustment screw or knob and turn it counterclockwise to lower the water level.

Flush the toilet and observe if the water stops running after the tank refills.

Look for Leaks

Leaks in the toilet system can also cause a toilet to continuously run.

Check for any visible leaks around the toilet base, water supply connections, or other components.

If you notice any leaks, tighten the connections or replace faulty parts accordingly.

Additionally, a leaky flush valve or flapper seal can contribute to a running toilet.

Inspect these components for leaks and make necessary repairs.


Why does my RV toilet keep running even after I flush it?

There can be several reasons for a running RV toilet, such as a faulty flush valve, worn-out flapper seal, or water pressure issues. Refer to the troubleshooting section of this article for detailed steps to resolve the problem.

How can I determine if the flapper seal needs to be replaced?

Inspect the flapper seal for any signs of wear, cracks, or misalignment. If it appears damaged or doesn’t create a proper seal when closed, it’s time to replace it.

Can high water pressure cause a toilet to continuously run?

Yes, high water pressure can sometimes lead to a running toilet. In such cases, installing a pressure regulator in the water supply line can help regulate the water flow and prevent the toilet from running.

I’ve checked all the components, but my RV toilet still won’t stop running. What should I do?

If none of the troubleshooting steps provided in this article resolve the issue, it’s recommended to consult a professional RV technician. They have the expertise to diagnose complex problems and perform necessary repairs.

How often should I inspect and maintain my RV toilet?

Regular inspections and maintenance are essential to ensure the proper functioning of your RV toilet. It’s recommended to inspect the toilet at least once every few months and perform routine maintenance tasks such as cleaning, lubricating moving parts, and replacing worn-out components.

Are there any preventive measures to avoid a running RV toilet?

Yes, there are a few preventive measures you can take. Avoid flushing large amounts of toilet paper or other foreign objects down the toilet. Additionally, conduct regular maintenance and inspections to catch any potential issues early on.


Dealing with an RV toilet that won’t stop running can be a frustrating experience.

However, armed with the knowledge and troubleshooting tips provided in this article, you’re well-equipped to tackle this problem head-on.

Remember to check the water supply, inspect the flush valve and flapper seal, adjust the fill valve, and look for leaks.

By following these steps and understanding the underlying causes, you can resolve the issue and ensure your RV toilet functions optimally during your travels.

Happy RVing!