Dealing with a faulty commode in your rig can quickly ruin a weekend getaway. Whether you are upgrading to a high-profile porcelain model or fixing a stubborn leak, knowing how to remove an rv toilet is a fundamental skill for any owner.
You might worry about the mess or the complexity of plumbing in tight quarters. We promise that with the right preparation and a few basic tools, you can handle this job in under an hour without calling an expensive technician.
In this guide, we will walk through the entire process from draining the lines to inspecting the floor flange. You will learn the professional tricks to keep the job sanitary and ensure your new installation sits perfectly level for years of travel.
Essential Tools and Supplies for the Job
Before you begin, gather your gear to avoid mid-job runs to the hardware store. Most RV toilets are held in place by two closet bolts and a single water line connection, making the tool list relatively short.
You will need a standard adjustable wrench or a socket set. A 1/2-inch or 7/16-inch socket usually fits the mounting nuts found on popular brands like Dometic or Thetford. A flat-head screwdriver is also handy for prying off the plastic bolt covers.
Sanitation is your top priority during this process. Keep a pair of heavy-duty nitrile gloves, a dedicated 5-gallon bucket, and plenty of old rags or paper towels nearby. A small hand-pump or sponge can help remove any remaining water from the bowl.
- Adjustable wrench or socket set
- Flat-head screwdriver
- Nitrile gloves and eye protection
- Old towels or rags
- Small bucket or container
- Replacement floor seal (if reinstalling)
- Plumber’s tape (Teflon tape)
Pre-Removal Checklist: Sanitation and Safety First
Working on a black water system requires a “safety first” mindset. Start by heading to a dump station and thoroughly emptying your black water holding tank. Flush the tank several times using the black tank flush or a wand to ensure the area below the toilet is as clean as possible.
Once the tank is empty, turn off your RV’s water supply. This includes both the city water connection and the onboard 12V water pump. Open a lower faucet or the low-point drains to bleed off any remaining pressure in the lines.
Step on the toilet flush pedal to drain the water currently sitting in the bowl. If a small amount remains, use a sponge or a small cup to bail it out into your bucket. Removing this water prevents a messy splash when you eventually tilt the unit to lift it out.
Finally, clear the bathroom of any rugs, trash cans, or decorative items. You need maximum floor space to maneuver the toilet, which can be surprisingly awkward in the tight confines of an RV bathroom or wet bath.
Step-by-Step: how to remove an rv toilet Without the Mess
Now that the area is prepped and the water is off, it is time to perform the actual removal. Follow these steps carefully to ensure you do not damage the PEX plumbing or the floor flange during the process.
Step 1: Disconnect the Water Supply Line
Locate the water line connected to the back of the toilet. In most modern rigs, this is a reinforced flexible hose or a PEX line with a hand-tightened plastic nut. Reach behind the base and unscrew this connection counter-clockwise.
Keep a small towel or container directly under the connection as you loosen it. Even with the water off, a small amount of “trickle” water usually remains in the pipe. Avoid using heavy pliers on plastic nuts, as they can crack easily under pressure.
Step 2: Remove the Mounting Bolt Covers
Look at the base of the toilet for two plastic caps. These hide the mounting bolts that secure the unit to the floor. Use your flat-head screwdriver to gently pry these caps upward.
Once the caps are off, you will see the nuts and washers. If your RV is older, these bolts may be corroded from moisture. Spraying them with a bit of penetrating oil and letting it sit for ten minutes can save you from snapping a bolt.
Step 3: Loosen and Remove the Nuts
Use your wrench or socket to remove the nuts from the closet bolts. Work slowly and ensure the bolt itself does not spin. If the bolt spins, you may need to hold the top of it with needle-nose pliers while turning the nut.
Place the nuts, washers, and plastic caps into a small bowl or magnetic tray. Losing one of these small parts down the open drain hole is a common mistake that can turn a quick job into a nightmare.
Step 4: Breaking the Seal and Lifting
Mastering how to remove an rv toilet requires a gentle touch during the “breakaway” phase. Unlike residential toilets that use heavy wax rings, RVs often use foam or rubber seals. These can stick to the base over time.
Straddle the toilet and grasp it firmly by the sides. Give it a gentle rock from side to side to break the seal’s grip on the floor. Once it feels loose, lift the unit straight up to clear the mounting bolts.
Step 5: Plug the Drain Hole Immediately
As soon as the toilet is out of the way, shove a large rag into the open floor flange. This serves two purposes: it prevents sewer gases from the black tank from entering your living space and prevents tools from falling into the tank.
Do not push the rag so far down that it falls into the tank. Leave a significant portion of the rag visible above the floor. This is a critical safety step that many DIYers overlook during their first attempt at plumbing maintenance.
Inspecting the Closet Flange and Subfloor
With the toilet removed, you have a rare opportunity to inspect the structural integrity of your bathroom floor. Look closely at the closet flange, which is the plastic ring that connects the toilet to the waste pipe.
Check for cracks in the plastic or signs of “flexing.” If the flange is loose, it can cause the toilet to rock, which eventually leads to leaks. Tighten the screws holding the flange to the subfloor if necessary, but be careful not to over-tighten and crack the plastic.
Examine the wood or linoleum around the flange for soft spots or discoloration. RV floors are often made of plywood or OSB, which can rot quickly if a slow leak has been present. If the floor feels “spongy,” you may need to address subfloor repairs before installing a new unit.
Clean the flange surface thoroughly. Use a plastic putty knife to scrape away any old foam or rubber residue. A clean, smooth surface is essential for the new seal to create a watertight bond when you reinstall the unit.
Common Problems and Troubleshooting Tips
Sometimes, learning how to remove an rv toilet involves dealing with unexpected hurdles. One of the most frequent issues is a spinning closet bolt. These bolts sit in a track in the flange; if the track is stripped, the bolt will just spin with the nut.
If this happens, you can often use a hacksaw or a rotary tool to carefully cut the nut off. Just be extremely careful not to damage the porcelain of the toilet or the plastic of the floor flange during the process.
Another issue is a stuck water line. If the plastic nut on the water line is frozen, do not force it with a large pipe wrench. Apply heat gently with a hair dryer to soften the plastic slightly, then try to turn it by hand with a rubber jar opener for extra grip.
If you notice a foul odor even after plugging the hole, your vent stack might be clogged. While the toilet is off, it is a great time to check the roof vent to ensure no bird nests or debris are blocking the airflow from the black tank.
Choosing Your Next RV Toilet Upgrade
If you are removing the toilet to replace it, consider your options carefully. Most entry-level trailers come with lightweight plastic toilets. Upgrading to a porcelain RV toilet adds a residential feel and is much easier to keep clean over time.
Consider the “profile” of the toilet as well. High-profile models sit at a standard chair height, which is much more comfortable for adults. Low-profile models are designed to sit on a raised platform or “step” often found in fifth-wheel bathrooms.
You might also look into macerating toilets or composting options if you do a lot of boondocking. Macerating toilets use blades to grind waste, allowing it to be pumped over longer distances, while composting toilets eliminate the need for a black tank entirely.
Frequently Asked Questions About how to remove an rv toilet
Do I need to use a wax ring like a house toilet?
No, you should generally avoid wax rings in RVs. RVs are subject to extreme temperature swings and constant vibration. A wax ring can melt in the heat or crack during travel. Instead, use a rubber or foam gasket specifically designed for RV use.
How long does it take to remove an RV toilet?
For a beginner, the process usually takes about 30 to 45 minutes. If you have done it before and the bolts are not rusted, you can easily have the unit out in under 15 minutes. Preparation and cleaning take up the bulk of the time.
Can I reuse the old mounting bolts?
While you can reuse them if they are in perfect condition, it is highly recommended to install new brass closet bolts. They are inexpensive and ensure that you won’t have to deal with rusted or snapped bolts the next time you need to perform maintenance.
What if the water line is too short for my new toilet?
This is a common issue when switching brands. You can easily extend the line using a PEX swivel adapter and a short length of flexible braided stainless steel hose. Most hardware stores carry these “faucet connectors” which work perfectly for RV toilets.
Final Thoughts on Your DIY Plumbing Project
Taking the leap to handle your own plumbing repairs is a great way to become a more self-reliant traveler. Now that you know how to remove an rv toilet, you can tackle leaks, floor repairs, or luxury upgrades with total confidence.
Remember that the secret to a successful job lies in the cleanup. Take the time to scrub the floor flange and inspect the surrounding wood. Addressing a small issue now prevents a massive, expensive repair down the road when you are miles away from civilization.
Always double-check your connections for leaks after reinstallation by turning the water on and waiting ten minutes before you put the tools away. Stay safe and stay comfortable on your next adventure, knowing your rig is in top-notch shape!
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