RV Toilet Solutions: Say Goodbye to Black Water Anxiety

For RV living, the best sanitation solution isn't about grand promises—it’s about seamless integration. You shouldn't have to think about your toilet. It should simply be there, delivering a premium, comfortable experience when needed, without ever creating an ounce of anxiety.

Shop RV Toilets

How Modiwell makes your lifestyle transition invisible, and your journey completely worry-free?

Modiwell dry flush toilet one-touch sealing technology

One-Touch Flush & Seal

Fully Automated. No composting mediums, no messy sawdust—free from stray shavings and dynamic liquid splashes.

Modiwell dry flush toilet compact seat height RV

Compact & Comfort

Ultra-Compact Footprint. Ergonomic Comfort. Designed for the perfect seat height. Delivering maximum comfort, even in the tightest quarters.

Modiwell eco-friendly refill bags EN 13432 certified

Environmental Friendly

EN 13432 Certified Eco-Polymer Refills. 100% self-contained and sealed cartridges. Waste bags can be disposed of following local diaper disposal guidelines.

Load video:

How a Dry Flush Toilet Works


Modiwell’s dry flush toilet uses independent sealing technology to maximize odor control. Fully automated with a simple one-touch operation, it features a lightweight, compact design that is easy to maintain. With no need for bulky waste disposal systems, it is the perfect choice for your RV.

Comparison table

Primary Positioning
Portable Camping & RV
Fixed Indoor / RV
Expanded Size
17.5″ × 16″ × 31.5″
17.4" x 14.4" x 34.4"
Folded / Storage Size
17.5″ × 16″ × 10.75″
17.4" x 14.4" x 18.9"
Waterproof
Not Support
IPX4 (Splash-Proof) Fully Closed Only
Standard Charging
AC Charger
Hardwired (9V-30V) & AC Charger
Product Weight
16.5 lbs
21.4 lbs
Weight Capacity
330 lbs
330 lbs
Load video:

Real-World Long-Term Review: Modiwell Dry Flush in a Winnebago Revel

Looking for an honest, unsponsored perspective on the Modiwell dry flush toilet? Check out this comprehensive, 6-month hands-on review from real-world overlanders. Based on daily use in a compact Class B van, this breakdown covers everything from cost-per-flush and odor management to durability on rough roads and how it compares to traditional cassette options. A must-watch if you are evaluating the right waste solution for your off-grid setup.

Shop RV Toilets

FAQs

Can I use the toilet in freezing winter weather? (Temperature limits)

Yes, but keep an eye on the temperature to protect the battery and ensure the best seal:

  • Best Operating Temp: 0°C to 40°C (32°F - 104°F). This is when the toilet seals best and runs most smoothly.
  • Storage Limits: The built-in lithium battery can handle -20°C to 60°C (-4°F - 140°F) when stored. Please never leave the toilet in extreme outdoor cold below -20°C for long periods, or it will permanently damage the battery.
How do I power the toilet based on my RV's voltage (12V vs. 24V)?

A: Both the LE-310 and R1808 can plug directly into standard wall outlets (100V-240V AC) using the standard power adapter. For DC/RV battery connections, please choose based on your system voltage:

1. For 12V RV Systems

  • If you have R1808: It has a wide voltage range of 9V–30V, making it perfectly compatible with 12V systems. You can hardwire it directly or use the LE-310 cigarette plug.
  • If you have LE-310: Use our dedicated LE-310 cigarette lighter plug (available for purchase separately).Note: Due to RV battery fluctuations, a car charger might not fully charge the LE-310 to 100%. Ensure the charging current does not exceed 2A.

2. For 24V RV Systems

  • If you have R1808: Since it supports up to 30V, it works perfectly on 24V systems for direct hardwiring. However, if you want to use a cigarette socket, the LE-310 plug will not work—you must purchase a standard DC 5521 cigarette plug instead.
  • If you have LE-310: NOT supported. The LE-310 is strictly limited to 12V supply. Its dedicated cigarette plug will be damaged on a 24V system.
Which refill bags should I use if it gets cold in my RV?

A: Temperature affects the flexibility of the bags, so here is our choice guide:

  • Above 10°C (50°F): All original Modiwell refills (Blue, Black, and White) work perfectly.
  • Between 0°C and 10°C (32°F - 50°F): Black and White bags can get a bit stiff, which might trigger the toilet's auto-safety shutoff due to high resistance.
  • Our Tip: If it's chilly, always choose the Blue refill bags. Their material is specially optimized for cold weather and runs much smoother.
Can I add a switch or a fuse to the toilet's power circuit?

Yes, you can install a switch or a fuse. However, please ensure that it remains powered on, as the toilet will only recharge its battery automatically when connected to a live power source and in sleep mode (after 5 minutes of inactivity).

How many times can the toilet seal after the RV disconnects from shore power?

When disconnected from external power, the machine can perform approximately 70-100 consecutive sealing operations relying entirely on its built-in lithium battery.

How do I replace my existing cassette toilet with the R1808 model?

Follow these three main steps:

  • Step 1: Remove the Old Unit – Remove your original cassette toilet and the black water tank entirely.
  • Step 2: Seal the Floor – Seal the old drain/discharge outlet with an appropriate sealing product. Make sure the floor surface is completely flat, clean, and level before positioning the new toilet.
  • Step 3: Connect the Power – Ensure you have a suitable power source ready. The R1808 offers flexible power compatibility:AC Power: Compatible with standard 100-240V AC outlets using the power adapter.DC Power: Compatible with 9-30V DC power systems if connecting directly to your house batteries.

🎥 Need a visual walkthrough? Check out our step-by-step video guides:

Frequently asked question

Use this text to answer questions in as much detail as possible for your customers.

Will the sealed bags generate odors inside a hot RV in places like Texas or Arizona?

No odor will be generated. The thermal sealing technology completely isolates the waste. The black bags feature an anti-odor property, and when paired with the coagulant, they keep the RV bathroom air fresh even during hot summer months.

How many consumables should two people prepare for a 7-day boondocking (off-grid camping) trip?

A standard set includes two rolls of waste bags, which provide a total of 60 uses. For a 7-day trip for two people, we recommend preparing one to two standard sets of consumables. To save consumables, we recommend using the standard 2L urine container so that the toilet bags are only used to seal solid waste.

After installing the R1808, do the waste bags need to be removed immediately after every single seal?

No. For the R1808, we recommend allowing 3 to 4 bags to accumulate at the bottom before disposing of them together.

What should I do if the toilet keeps beeping or won't start the sealing process?

For the R1808, continuous beeping usually means the toilet lid or the bottom hatch door is not completely closed. The system features a safety interlock and must be fully sealed to start. For other faults (such as an E4 code), please visit our [Technical Support Center → Link]

Blog posts

5 Cassette Toilet Pain Points & Modern Alternatives

5 Cassette Toilet Pain Points & Modern Alternatives

Solve 5 cassette toilet pain points: odors, dumping, and freezing. Compare TCO and find the best modern dry flush toilet solution for your vanlife.

Read moreabout 5 Cassette Toilet Pain Points & Modern Alternatives

RV toilet type for Modiwell dry flush RV toilet

Types of RV Toilets: Complete Classification & Comparison

Learn the main types of RV toilets, how they work, who they’re best for, and the real trade-offs— a practical guide to help you choose without regret.

Read moreabout Types of RV Toilets: Complete Classification & Comparison

The Modiwell toilet can be folded up to save space.

Small RV Toilet: How to Choose When Space Is the Real Constraint

Learn what actually makes an RV toilet “small,” which layouts it fits, and common mistakes to avoid in tight RV spaces.

 

Read moreabout Small RV Toilet: How to Choose When Space Is the Real Constraint