How Hard Is It to Replace an RV Toilet?

Posted by Dave on May 21st 2026

How Hard Is It to Replace an RV Toilet?

If your RV toilet is leaking, won’t hold water, smells bad, or simply feels outdated, you may be wondering: How hard is it to replace an RV toilet?

The good news is that in many cases, replacing an RV toilet is actually a fairly straightforward DIY project. Most RV toilets are designed to be easy to remove and install using basic hand tools, and many replacements bolt directly onto the existing floor flange.

For many RV owners, the entire job can often be completed in less than an hour.

Is Replacing an RV Toilet Difficult?

For most RVs, replacing a toilet is considered a beginner-to-intermediate DIY repair. If you are comfortable using a wrench and working in a small bathroom space, you can usually handle the installation yourself.

The difficulty level depends on a few factors:

  • The type of toilet currently installed
  • Whether you are replacing it with a similar model
  • Access to the mounting bolts and water line
  • Condition of the floor flange and seal
  • Whether you are upgrading from plastic to porcelain

In most cases, standard gravity-flush RV toilets from brands like Dometic and Thetford are designed for relatively easy replacement.

Basic Steps to Replace an RV Toilet

1. Turn Off Water and Drain Pressure

Start by turning off the RV water supply and disconnecting city water. Flush the toilet to relieve pressure in the system.

2. Disconnect the Water Line

Most RV toilets use a simple rear water connection that can be removed with an adjustable wrench.

Keep a towel nearby, as a small amount of water may spill out.

3. Remove the Mounting Bolts

Most RV toilets are secured with two floor bolts covered by small plastic caps.

Once the nuts are removed, the toilet lifts straight up off the floor flange.

4. Inspect the Floor Flange Seal

Before installing the new toilet, inspect the closet flange seal for damage, cracking, or compression.

Many RV owners replace the flange seal anytime the toilet is removed.

Thetford Seals Found Here

Dometic Seals Found Here

5. Install the New Toilet

Most replacement RV toilets simply lower onto the existing bolt pattern and reconnect to the same water line.

Tighten the mounting nuts evenly, reconnect the water line, and test for leaks.

Are All RV Toilets the Same Size?

No — and this is one of the most important things to check before ordering a replacement.

You should verify:

  • Bolt pattern
  • Rough-in distance
  • Pedal clearance
  • Height (standard vs low profile)
  • Bathroom space
  • Seat shape (round vs elongated)

Fortunately, many popular RV toilets use a common 2-bolt floor mount system.

Click Here for our post on Rough-In Distance

Common RV Toilet Upgrade Options

Many RV owners replace older plastic toilets with more comfortable porcelain models during the upgrade process.

Popular upgrades include:

Budget-Friendly Options

Mid-Range Upgrades

Premium Comfort Upgrades

These premium models often provide:

  • Taller residential-style seating
  • Better flushing performance
  • Easier cleaning
  • More comfortable elongated seats

Can You Replace an RV Toilet Yourself?

In many cases, yes.

Most RV toilet replacements do not require:

  • special plumbing tools
  • cutting pipes
  • modifying tanks
  • complicated plumbing work

The majority of installations involve:

  • disconnecting one water line
  • removing two mounting nuts
  • swapping the seal
  • reinstalling the new toilet

When Replacing an RV Toilet Gets More Difficult

Some situations can make installation more challenging:

Water Damage Around the Toilet

Soft flooring or water damage near the mounting area may require subfloor repair.

Tight Bathroom Layouts

Certain RV bathrooms have limited space that can make bolt access difficult.

Switching to Electric Toilets

Upgrading to a Tecma or other electric toilet may require electrical connections and additional plumbing considerations.

Should You Replace or Repair Your RV Toilet?

Sometimes a simple repair is all you need.

Common replaceable parts include:

  • Water valves
  • Blade seals
  • Waste ball seals
  • Flush pedals
  • Springs
  • Floor flange seals

However, replacement may make more sense if:

  • the toilet body is cracked
  • odors persist
  • the flush mechanism is heavily worn
  • replacement parts are discontinued
  • you want a comfort upgrade

For example, many RV owners choose to replace older or problematic toilets with newer upgraded models rather than continuing to repair aging units.

Read our post on "Fix or Flush Dilemma" Here!

Final Thoughts

Replacing an RV toilet is often much easier than many RV owners expect. In many cases, it is one of the simpler RV plumbing repairs and can be completed with basic tools in a relatively short amount of time.

The key is choosing the correct replacement model and replacing any worn seals during installation.

If you are unsure which RV toilet fits your camper or motorhome, identifying your current model first can make the process much easier.

Related RV Toilet Help Topics