Why Does My RV Toilet Fill with Water

Why Does My RV Toilet Fill with Water? 2024 Answer

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Last Updated on March 31, 2024 by Jessica Lauren Vine

Your RV toilet isn’t like a house toilet, so you’re probably asking, “Why does my RV toilet fill with water?” if you start seeing water after you take your foot off the pedal.

Your RV toilet should not fill with water. If it fills with water, that is likely because of a defect in either the water valve or foot pedal, or you may be dealing with water pressure irregularities or a water seal problem.

Should an RV Toilet Hold Water in the Bowl?

The only time an RV toilet should hold water in the bowl is when you put it there using the foot pedal before flushing. Before you flush, you should partially fill the bowl of the toilet and then hold the pedal down for about ten seconds. However, at any other time, there shouldn’t be water in the RV toilet like there is at your house.

How to Fix an RV Toilet Bowl That Is Holding Water

If your RV toilet bowl is holding water or if it continues running even after you let up on the foot pedal, hang time because we can help you get to the bottom of this. You don’t want to fill up your holding tanks with all that extra water — especially if you don’t have full hookups.

Use Vasoline to Fix Your RV Toilet’s Seal

You may be in luck and need to add some Vaseline to the edge of the seal for your toilet. If you do this about every month, this can help you keep from dealing with this problem. If it isn’t shutting properly or gets stuck, this could cause water to fill up in your toilet bowl.

Fix or Replace Your RV Toilet’s Water Valve

The common culprit for this problem could be a little more work than the seal in your RV toilet. You may need to totally replace the water valve in your RV toilet if it’s too badly damaged or if there is debris in there that you can’t get out.

Depending on the brand of toilet you have, your toilet’s valve could be in a different spot. If you still have the manual, take a look, or you can look the manual up online to see where yours is. But most of the time, it will be on the back or the side of the RV toilet.

Install a Water Pressure Regulating System

Another reason there could be problems with your RV’s toilet filling up with water is the water pressure in your RV. A lot of people try to operate without water pressure regulators, but I’ve literally had a friend’s faucet blow off in their RV, so it’s really important you don’t skimp on this part of things.

Renator RV Water Pressure Regulator Valve
  • Brass
  • Lead-free
  • Adjustable water pressure reducer
  • Gauge for RV camper
  • Inlet screened filter
  • High quality
  • Easy to install
  • Easy to use
  • Universally compatible
  • Can't get a rebuild kit
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03/30/2024 09:54 am GMT

If you don’t have a water pressure regulator on your RV, this might be the reason for your toilet woes and other water problems you might experience.

Fix the RV Toilet Pedal

Your RV toilet pedal could be the problem if the other issues aren’t it.

Try to put the pedal upward and see if that stops the water. If it does, then you can safely assume this is where your problem stems from. If the pedal is busted, then it’s time to get a new one and fix this so you can keep using the toilet and don’t run into an overrun situation.

Thetford Pedal Kit
  • 42067
  • White

Make sure to check your toilet and see if this is a compatible toilet pedal.

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Why Does My RV Toilet Fill with Water? – Conclusion

Now you understand more about why your RV toilet fills with water and how to fix it. Leaving your RV alone with your toilet is having water issues is scary, so make sure you fix it right away, so your RV doesn’t flood. That causes a whole other bunch of problems you don’t want to deal with.

Now, before you go, make sure you check out these other RV-related articles.

Why Does My RV Water Pump Pulsate When Not Using Water?

Where Are Westinghouse Generators Made?

How Do People Afford Full Time RVing?

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