Best Composting Toilets

An In-Depth Review of the Top Composting Toilets

Have you heard of a composting toilet? Are you looking to help the environment, but wondering whether using a composting toilet is safe? You may be considering a composting toilet for your RV, boat, or a secluded house that is not hooked up to plumbing. Or, maybe you are looking into being more eco-friendly and want to purchase a composting toilet for your own home.

Top 3 Composting Toilet Reviews

Below, we will review three composting toilets. We will discuss the advantages and disadvantage for each toilet so you can decide if it is right for you.

The Nature's Head Dry Composting Toilet with Standard Crank Handle is a great option if you are looking for a composting toilet for your RV, cabin, or home. This toilet features a full-size seat that is molded in on the toilet. This will provide you with safety and comfort when you use the toilet.

When you use this composting toilet, it will separate liquid waste from solid waste. This eliminates the sewage smell you may associate with using an outhouse or other more remote bathroom options. 

The toilet features holes in the front that will drain the urine into a collection bin. Unlike when you use a regular toilet, it is important for everyone to sit on this toilet, even when you just need to urinate. This is to make sure that the urine makes it into the liquid bottle and does not get mixed with the solid waste. Depending on how frequently you use the toilet, you'll probably want to empty this bin about once a day.

The liquid waste bin is translucent, so you can monitor the level and know when it needs to be emptied. To empty the liquid waste container, you just need to unlatch the toilet and remove the container. Then, the waste can be discarded in an appropriate manner, such as by pouring it on mature trees or diluting it to pour on plants.

When there is solid waste produced when you use the toilet, you just need to open the tank trap for solids. After you have finished using the bathroom, you just need to spin the crank handle about two or three times to mix the solid waste with the composting material. You'll also want to add a spritz of vinegar to keep the toilet clean. A spray bottle comes with the toilet for this purpose.

When you purchase this Nature's Head toilet, you will also want to purchase sphagnum peat moss or coconut fiber. You will need two one-gallon bags of either of these each time you empty the solids bin. It is important to make sure that you purchase something without any additives. You also don't want to use soil from nature, since it will likely have insects or other bugs in it.

The frequency with which you use your toilet will determine how often you will need to empty the composting tank. If you do not use the toilet very often, the compost mixture can stay in the toilet for months. However, if you are using the toilet on a regular basis, you'll probably want to empty it about every two weeks or so.

Emptying the compost tank is simple. You just need to pour the contents into a trash bag for disposal. The compost material can be added to a compost bin, buried, or placed in a dumpster if you do not have access to a bin. Once the tanks contents have been completely composted, they can be used to fertilize plants, but it is not recommended to use them to fertilize any plants that may be eaten.

The Nature's Head Composting Toilet with Standard Crank Handle eliminates odors. The composting material gets rid of any odors associated with solid waste. Additionally, there is a fan on the side of the toilet that pulls air from the tank away from the toilet. The fan also helps to minimize any odor you may normally notice when using the toilet.


  • You do not need any chemicals, everything is taken care of naturally.
  • Installing this toilet is simple.
  • The toilet includes a five-year warranty.


  • Some users have complained that lifting the solids tank to dump it out is challenging.

If you are looking for a more compact composting toilet that resembles a standard toilet, then you should consider the Villa 9214 Composting Toilet by Separett. This is a waterless toilet that has many features that make it a great option for any home, RV, or off-the-grid location.

This composting toilet handles liquid waste differently than most other composting toilets. In other toilets, the liquid waste is diverted from the solid waste and collects in a container attached to the unit. 

This container needs to be emptied every day or two. But with the Villa 9215, you don't need to worry about emptying the liquid waste container. This toilet uses a piping system to pipe the urine directly outdoors. You can either have it collect in a big tub outside, or simply allow it to run off, since urine is a sterile liquid.

Solid waste is sent into the composting tank with this toilet. Unlike some other toilets where you need to open the door to the solid waste tank before you use the bathroom, with the Separett Villa 9215, the pressure of you sitting on the toilet seat opens the door to the solid waste compartment. This means that you don't need to look down into the compartment if you don't want to when you use the bathroom.

Separett has also tried to distinguish itself from some other composting toilet brands by making it easier to dispose of the contents of the solid waste tanks.

There are compostable bags which you can place in the bin to collect the waste, then when you are ready to empty the tank, you can simply remove the full bag and replace it with a new one. With other toilets, you must dump the contents of the tank into a trash can or bucket to empty the solid waste tank. With normal use, the solid waste tank should be emptied about every three weeks.

The Separett Villa 9215 can be hooked up to your household AC power or can operate using DC battery or solar power. The power operates the toilet's fan which moves air over the solid waste tank that dries it out. There is no odor produced when you use this toilet.

This toilet does not require you to use peat or soil in the composting bin. The fan works to completely dry out the waste, removing any odors from it and eliminating the need for any composting material, such as peat.

Unlike some other toilets where you must turn a handle after using the bathroom, there is nothing that you need to do with the toilet. You can just take care of your business and be on your way.


  • When done using the bathroom, you do not need to turn a handle or crank
  • Urine is diverted outside, so you don't need to worry about emptying a urine collection bin.
  • You can use compostable bags inside the solid waste tank, so all you will need to do is remove the bag and replace it when you empty the tank.
  • This toilet includes a five-year warranty for manufacturer defects and a three-year warrant for the included fan.


  • The Separett Villa 9125 Composting Toilet is more expensive than some other models.

The Nature's Head Self Contained Composting Toilet is designed to fit in tight spaces. It was initially designed to be used on a boat by two sailors. It features a spider handle, which sits tight against the toilet, that you can spin to compost solid waste. Since the toilet was originally designed to be used on boats over the rough ocean waters, it is durable and constructed from high-quality materials. All the toilet's hardware is stainless to add to its durability.

This composting toilet separates liquid waste from solid waste to prevent any sewage-like smells. The liquid waste is diverted to the front of the toilet and collected in a bin attached to the toilet. You need to be sure to empty the liquid waste bin because it can overflow if it becomes too full. However, the urine will not overflow onto your floors, there is an additional chamber in the toilet that will catch it.

The liquid waste bin is translucent, so you'll be able to keep an eye on when it needs to be emptied out. With normal use, you'll probably need to empty the bin once every day or two. To empty the urine from your toilet, simply remove the bin and dispose of the urine (it can be poured on large trees and diluted and used to water plants since urine is sterile).

When you need to use the Nature's Head Self Contained Toilet to have a bowel movement, simply open the solid waste door so your waste will enter the composting bin. Once you are done, close the door and turn the spider handle a few times to mix the waste with the composting material. Nature's Head recommends that you use coconut fiber of sphagnum peat moss in the composting bin. Each time you empty the tank, you will need two gallons of the material you choose to refill the bin.

This toilet works well to prevent odors. There is a fan attached to the toilet that works to dry out the waste and pull air from the solid waste tank to the exterior of your home or RV. The fan is also effective at eliminating unpleasant odors while you are using the bathroom.

Like other composting toilets, the frequency with which you'll need to empty the solid waste tank will depend on how often the toilet is used. If you are using the toilet pretty consistently, you will probably need to empty the tank about every two weeks.

If you are using the toilet on and off, the tank will not need to be emptied as frequently. You will be able to tell that the solid waste tank needs to be empties when it becomes more difficult to turn the spider handle.

To empty the solid waste tank, you just need to dump the contents into a trash bag or another container. The contents of the trash bag can then be dumped into a compost bin. Or, if you are not near a compost bin, you can buy the waste or toss the bag into a dumpster.


  • With the spider handle, this toilet is compact and can fit in tight spaces.
  • The fan attached to the toilet works well to eliminate odors from the solid waste bin. It also eliminates odors when you are using the bathroom.
  • You do not need to have access to water to flush this toilet.
  • When you purchase the Nature's Head Self Contained Composting Toilet, you will receive a five-year warranty from the manufacturer.


  • You can not use a bag liner for the solid waste bin, so you have to dump the contents into a bag or another container to empty the compost.

What are Composting Toilets and How Do They Work?

A composting toilet is designed to turn human waste into a nutrient rich soil that is safe to handle. In order to convert human waste in an efficient and safe manner, there are three things that all composting toilets must do.

A composting toilet must first evaporate the moisture from the waste. While still leaving the waste a little moist to help it compost, the toilet must eliminate the majority of the moisture from the waste. Different toilets complete this step differently. Some may have a heating element to speed up the evaporation process and some have a waterless urinal that is separate from the other components.

After the moisture has been evaporated from the waste, a composting toilet needs to turn the waste into compost without creating an odor. If the waste were left on its own, it would break down eventually, but it would take a long time and would create a very unpleasant odor.

To turn the waste into compost, a bulking material is added to the toilet to aid in the process. Bulking materials may include sawdust, peat mix, or popcorn. Adding a bulking material to the composting toilet helps to break down the waste quickly and makes the compost safe to handle. Additionally, a bulking material helps to allow ample oxygen into the waste to break it down safely.

Finally, a composting toilet must create an end-product that is safe to handle. When a composting toilet is performing its job correctly, the resulting compost that is produced should be perfectly safe to handle and use in your garden.

A composting toilet is an eco-friendly option. When you use a composting toilet instead of a regular toilet, you are saving tons of water and energy. Every time you flush a standard toilet, it uses seven gallons of water. Just think about how many times your toilets are flushed by each person in your home and you can easily see how much water you'll be saving when you use a composting toilet.

Another way that composting toilets are eco-friendly is that they allow you to create nutrient rich soil. Many new plants will be able to thrive in the soil you are able to make using your composting toilet.

In addition to all the ways that composting toilets help the environment, there are other benefits to having one in your home, RV, or another location. Composting toilets are very easy to install, so you won't have to worry about hiring a plumber or having to deal with turning the water on and off.

Finally, a composting toilet is much easier to maintain and empty than the back tank of an RV. You won't have to worry about taking time away from your vacation to deal with this unpleasant task when you have a composting toilet.

As you can see, there are some different options available if you are looking to purchase a new composting toilet. Each of the options we reviewed above have some similarities as well as a few key features that set them apart from the other models.


things to keep in mind

Before you purchase a new composting toilet, you will want to determine which features are most important for you and look for the toilet that will best meet your needs. All the toilets reviewed above separate liquid waste from solid waste. This is an important feature you'll want because it helps to prevent the sewage smell associated with using an outhouse or in-ground toilet.

All three of the composting toilets reviewed open up to allow you to remove the composting waste, about every two weeks with regular use. To empty the two Nature's Head's toilets, you need to dump the solid waste bin into a trash can or another container.

Since the Separett Villa 9215 allows you to put a compost liner in the bin, to empty it, you simply need to remove the bag. Before you make your decision about which composting toilet is right for you, consider how you will be most comfortable emptying and disposing of the compost created by your toilet.

Another feature to consider when deciding which toilet is right for you is how the toilet disposes of the liquid waste. The Separett Villa 9125 pipes urine to the outside of your home, where it can be collected in a bin or run off onto the ground.

The Nature's Heads toilets have a liquid waste collection bin that will need to be emptied every day or two. Empty the bin is very simple though, and will not take much of your time.

Before you purchase a composting toilet, you should also consider how the toilet works to remove the odor from your waste. With the Nature's Head models, you just add sphagnum peat moss or coconut fiber to the composting bin.

Did You Know?

Composting toilets actually smell less than regular toilets. Since a composting toilet separates liquid waste from solid waste, they don't create the sewage smell associated with toilets that flush or latrines.

The composting material mixes with the solid waste and eliminates odors. With the Separett Villa, no peat or other composting material is required. The toilet's fan works to effectively dry out the solid waste and removes any odors.

A composting toilet is a great option if you own a boat, an RV, a cabin in the woods, or are just looking to do your part to help the environment. The way a composting toilet works to convert human waste into usable compost is pretty impressive.

And, the fact that they can do so without leaving an unpleasant odor where they are used is almost more impressive.

If you are on the market for a new composting toilet, the three models we reviewed above would all be a great addition to your space.

You just need to decide which composting toilet has the most features that you love and make your final decision. You will be pleased with how easy it is to install, use, and empty your new composting toilet.