The search for a composting RV toilet started before we even purchased our RV. After reading numerous articles and threads about the use and operation of RV toilets, we decided to look into composting toilets for RVs. These are the options we found during our research. We hope you find this information helpful in making your decision. Read about how we made out with our composting bucket toilet.

Newmar RV toilet

Why a Composting Toilet for the RV?

1. Avoid Human Sewage

Our RV came with a Dometic® 310 China Bowl Stool connected to a 40 gallon black tank. We would need dump it about every 7-10 days for the two of us living in it full time. That’s a lot of trips to the dump station to empty sewage from the tank, which neither of us wanted to do. Granted, we still need to go to the dump station to empty the gray tank.

2. Save Fresh Water

Composting toilets do not require water. It’s a dry toilet that uses organic materials to treat human waste. For us, that means our 75 gallon fresh water tank will last longer for more showers, dish washing and for drinking (which we run through a Berkey filter).

3. Increase Gray Tank Capacity

Not using the black tank for a toilet gives us the option to use it as an overflow for the gray tank and increase our grey water capacity. Fewer trips to the dump station is a good thing in our book.

RV Composting Toilets

1. Air Head Dry Composting Toilet

Cost: $1,029
Solid Capacity: Full time for two adults is approximately 60 uses for 1 month
Liquid Capacity: 2 gallons
Features: 12 volt fan
Warranty: 5 years
Made in USA

2. Sun-Mar Mobile Composting Toilet

Cost: $1,775
Solid Capacity: Full time for one adult or families of two
Liquid Capacity: n/a has an evaporation chamber
Features: 12 volt fan & 110 volt heating element
Warranty: 5 year on fiberglass tank and 3 year on all other parts

3. Nature’s Head Composting Toilet

Cost: $925
Solid Capacity: Full time for two is approximately 60 to 80 uses for 3 to 4 weeks
Liquid Capacity: 2.2 gallons
Features: 12 volt fan
Warranty: 5 years
Made in USA

4. C-Head Portable Composting Toilet

Cost: $609+
Solid Capacity: Full time for two is approximately 10-12 uses for 1 week
Liquid Capacity: 1 gallon
Warranty: 30 day return policy on unused units

5. Bucket Composting Toilet

Cost: $10+
Solid and Liquid Capacity: 5 gallons
Learn more about a bucket toilet:

Things to Consider Before Getting a Composting Toilet

1. Space

The first thing we did was measure the available space to install a new toilet. Our RV will fit a toilet up to 24 inches wide and 20 inches deep.

2. Installation

Some composting toilets require ventilation and power for the fan, which would require drilling holes and running a hose.

3. Organic Material

Access to organic material such as sawdust or coco fiber and storage space.

4. Cost

There is a significant difference between the DIY $10 bucket toilet to the $1k+ composting toilet. After taxes, shipping and installation, a composting toilet could end up costing a lot more than expected. Is it worth it?

Portable RV Toilets

If you decide not to go the composting toilet route, here are two portable RV toilet options we found during our research:

Dry Flush Laveo

THETFORD Porta Potti Curve

Would you use the regular RV toilet or swap it out with a composting toilet? Which composting toilet would you pick? Share your thoughts below!

If you want a good laugh, read about how we made out with our composting bucket toilet.