How to unclog rv toilet?

Clogged toilets in an RV are not only frustrating but can also lead to unpleasant smells and more serious plumbing issues if not addressed quickly. Luckily, unclogging an RV toilet is a manageable task if you know the right steps. Here’s how you can fix it:


1. Avoid Flushing More Water

If you notice a clog, avoid flushing more water into the toilet. RV toilets work differently than household ones, and adding more water can lead to a messy overflow or even damage the system.


2. Use a Plunger

A plunger is your first line of defense for unclogging your RV toilet. Get a good-quality plunger with a flange that creates a strong seal over the drain.

  • Step 1: Ensure there’s enough water in the toilet to cover the plunger’s rubber part.
  • Step 2: Push the plunger up and down vigorously for about 30 seconds.
  • Step 3: Flush the toilet and see if the clog has cleared.

If the clog remains, move on to the next method.


3. Try Hot Water and Dish Soap

Sometimes a mix of hot water and dish soap can help break up a clog. The soap lubricates the pipes, while the hot water helps loosen any waste buildup.

  • Step 1: Boil a pot of water, then let it cool down slightly (avoid pouring boiling water directly into your toilet, as it could damage the pipes).
  • Step 2: Pour about ¼ cup of dish soap into the toilet.
  • Step 3: Slowly pour the hot water into the bowl.
  • Step 4: Let it sit for 10-15 minutes, then flush to see if the clog has cleared.

4. Use a Toilet Snake (Plumbing Auger)

A toilet snake, also known as a plumbing auger, is a flexible tool designed to reach deeper clogs that a plunger can’t handle. This can be especially useful for an RV toilet, as clogs can happen further down the pipes.

  • Step 1: Insert the auger carefully into the toilet drain until you feel resistance.
  • Step 2: Twist the handle to push the snake through the clog and break it apart.
  • Step 3: Retract the auger and flush to see if the blockage is cleared.

5. Check the Black Water Tank

Sometimes the clog is not in the toilet itself but in the black water tank. Over time, waste can accumulate and block the passage. In such cases, you may need to flush the tank.

  • Step 1: Attach a hose to your RV’s sewer drain and open the black water tank valve.
  • Step 2: Use a tank flushing system (if available) to wash out the tank.
  • Step 3: Run clean water through the tank until the waste flows out freely.

Adding RV-specific tank treatments regularly can help break down waste and prevent future clogs.


6. Use Enzyme Cleaners

RV-specific enzyme cleaners can help break down waste in the toilet and black water tank, which could solve a clog.

  • Step 1: Pour the recommended amount of enzyme cleaner into the toilet.
  • Step 2: Let it sit for several hours (or overnight) to allow the enzymes to break down the waste.
  • Step 3: Flush the toilet and see if the clog is gone.

7. Prevent Future Clogs

Once your RV toilet is unclogged, take these steps to prevent it from happening again:

  • Use RV-safe toilet paper: Always use toilet paper specifically designed for RVs. It’s more biodegradable and breaks down faster than regular toilet paper.
  • Flush regularly: Keep the system clean by flushing the toilet with plenty of water after each use, especially for solid waste.
  • Treat the black water tank: Use a black water tank treatment regularly to help break down waste and prevent buildup.

If your RV toilet remains clogged despite trying these methods, it might be time to call in a professional. At Custom-way, we can help you inspect and repair your RV’s plumbing system, ensuring everything is back in working order before your next trip.


With these methods, you should be able to tackle most RV toilet clogs yourself. Just remember to stay patient and take preventative measures to avoid future clogs. Safe travels from Custom-way!