rv toilet flush valve leaking

RV Toilet Flush Valve Leaking- Fix It Right Away!


RV toilet flush valve leaking can be quite an issue when you’re on vacation with your friends or family on your RV. 

We know how frustrating it can be when you see the continuous flow of water in your toilet, which doesn’t seem to stop at all. And we are here to move such troubles away today.

So, without further ado, let’s get started-

Reason for the Flush Valve Leak

You see, the flush valve of your RV toilet is an inside part of the tank that allows the freshwater into the bowl when you press the flush button. 

There are various types of flush valves according to size and material. But most of the time, the material is the cause of all issues. 

Brass and plastic flush valves are the ones that you’ll find the most in the market. However, when it comes to leakage, it can happen to every one of the flush valves available.

The most common issue is unevenness or corrosion. It can even cause the most durable brass flush valve to leak. 

In most cases, the seat of the flush valve wears out and becomes uneven. Unfortunately, this can occur because of excessive force while putting it in. 

Brass or plastic flush valve; it doesn’t matter which one you choose. But yes, the brass flush valve is more durable when it comes to facing any kind of breakage. 

Anyhow, if your RV is really old, it’s not surprising if you face leakage issues like this with the flush valve. But you can always take care of it. 

List of the Necessary Equipment

No need to worry because you won’t need any specialized pieces of equipment for this process today. Some basic tools will soon get you a perfectly working toilet.

Here are the things you’ll need-

  • Fresh Towel
  • Screwdriver
  • Clump Cutter
  • A Brand New Flush Valve
  • Channel Lock Pliers
  • Teflon Tape

RV Toilet Flush Valve Leaking- How to Change the Faulty Valve

Your RV travels with its own water tank that supplies the water to your washroom. If you don’t bother about the flush valve leak now, your water tank will be getting empty soon. 

So, let’s check out the steps that’ll help you get it all fixed right away-

Step 1: Turn Off the Water Supply

Most people forget this first step and that results in the rain inside the washroom of your RV. So, make sure that you go on and turn off the main water supply of the washroom. 

Step 2: Flush the Toilet

Now that you’ve turned the water supply off, you could just start the work, right? 

Nope. You still have some water left in the flush tank. So, press the flush button and flush the toilet. Make sure that you totally make the flush tank empty.

Step 3: Unplug the Supply Pipes

When you notice the slush valve point, you’ll see two pipes. One of the pipes is for the main water supply, which supplies the water to your toilet’s flush tank. 

The other pipe supplies that stored water in the flush tank to the bowl when you press the flush button. 

Both of the pipes are connected through the flush valve. In your case, that’s the culprit you might be looking for today.

You need to carefully unplug the pipes so that there’s no water dripping. However, there’s always a small amount of water in the lines.

So, grab a fresh dry towel and place it under the pipes when you open them. That way, the towel will soak all the water. 

Then, remove the pipes from the flush valve as gently as possible. Try to use your hands more to remove them. 

Step 4: Remove the Defective Flush Valve

It’s time to remove the headache that’s been troubling you so much. Use the screwdriver to unscrew the flush valve and pull it out using a plier. 

Remember to be as much gentle while removing the flush valve. We don’t want to break anything that’s working fine today. 

You can use the channel lock pliers if it’s too hard to move. Also, you can use the clump cutter to get rid of the old clump that holds the pipes.

Step 5: Place the New Flush Valve in Place

Hopefully, you have your new flush valve on hand because we’ll need that placed right away at the old one’s spot. 

Place the new flush valve in position and secure it with the screws that come with it. Use the screwdriver to tighten it and make sure that you’re not going too tough on it. 

Step 6: Plug in the Supply Pipes

Now that you have the flush valve in place, you need to plug in the water supply pipes with the flush valve. Use the channel lock pliers to secure it tightly. 

However, you can use Teflon tape to make the seal more secure. These tapes help the seats of the supply pipes to be more secure. Also, don’t forget to place the clump on the supply pipes.

Step 7: Turn On the Water Supply

Make sure that everything is set sequentially as we presented to you. Now turn on the water supply so that you can carry on as you did in the past. 

Step 8: Recheck for Leaks

As we’ve come to an end, you should give the last check for any leak that you might have missed. 

Use your fingers to go over the flush valve area and check if there’s still any water flowing or not. Another way to find out a leak is to use a dry cloth to figure out any leak at the valve. 


That’s all we had on the RV toilet flush valve leaking today. Always remember that it’s better to get rid of a problem right away than to keep it waiting for the next day. 

So, let’s start on the flush valve repair right away because we don’t want you to have an extra headache while you’re having fun with your loved ones.

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