RV toilets are simple, but when they act up, you notice right away. These are the seven problems we see most, what causes them and how they’re fixed.
The seven issues
- Won’t hold water in the bowl — a worn or dirty flush-valve seal. Cleaning or replacing the seal usually fixes it.
- Leaks at the base — a failed floor flange seal. The toilet needs to be removed and re-sealed; check the floor for water damage.
- Leaks behind the toilet — a cracked water valve or loose supply line.
- Odors — a bad seal, a vent problem, or low water in the bowl.
- Clogs — non-RV toilet paper or too little water. Use RV-safe paper and plenty of water.
- Pedal or handle sticking — mineral buildup or a worn mechanism.
- Weak flush — low water pressure, a clogged inlet screen or a failing valve.
Prevent problems
- Use RV-safe toilet paper and tank treatment
- Keep water in the bowl
- Dump tanks regularly and flush them
- Lubricate seals with a seal conditioner
Parts and repair
Our parts store stocks toilet parts and tank treatments, and our technicians can repair or replace the toilet. See RV parts and RV repair.
Frequently asked questions
Why does my RV toilet smell?
Common causes are a worn seal, a vent problem or not enough water in the bowl.
Can I use regular toilet paper?
It’s safer to use RV-safe paper that breaks down quickly.
Can a leaking toilet damage the floor?
Yes — base leaks can rot the subfloor, so fix them promptly.
Need help with this? See our RV repair and maintenance service, call (949) 830-1996, or request an appointment. Appointments are available Monday through Friday, and Saturday appointments begin January 1, 2027.
Have a question about your RV?
Our service advisors answer the phone — and we put the estimate in writing before any work.
