A camper dry toilet solves the problem of having a toilet in your van without water or chemicals. If you’ve spent a few trips sleeping inside and have already asked yourself the question, here’s exactly what it is, how it differs from the traditional portable toilet, and how to choose one that suits your vehicle.
What exactly is a dry toilet?
A dry toilet is a portable toilet that separates solid and liquid waste at the source, with each going into its own container, and works without water or chemicals. The solids are covered with a dry material (sawdust, coconut fiber, or peat) that absorbs moisture and slows decomposition. That’s the whole trick: bad odors in a toilet appear when solids and liquids mix, so if they never come together, the problem disappears.
That’s why it’s also called a composting toilet, separating toilet, or dry toilet. They’re all the same concept under different commercial names.
Dry toilet or chemical toilet: the differences that matter
The portable chemical toilet is the classic camping toilet, the one almost everyone calls a porta-potty. It works the opposite way: everything mixes in a single tank with a deodorizing liquid that slows decomposition and masks odors. It’s not inherently better or worse; it simply solves the problem differently.
| Dry toilet | Chemical toilet (porta-potty) | |
|---|---|---|
| Water | Not needed | Water needed for flushing |
| Chemicals | None | Deodorizing liquid |
| Emptying | Solids in the trash, liquids in a toilet | Only at designated disposal points |
| Emptying frequency | Solids every 2 or 4 weeks with normal use | Every 3 or 5 days |
| Odor | Very low when used properly | Controlled by the chemicals |
| Upfront cost | Higher | Lower |
The practical difference you notice most on a long trip is emptying. With a chemical toilet, you have to find an authorized disposal point every few days, which affects your route. With a dry toilet, solids go in the regular trash and liquids can be emptied into any toilet, giving you more independence.
Types of dry toilets for vans
There are three types in this category, and they work very differently in everyday use.
Simple separation
The most common type in vans. A separator directs liquids into a front container and solids into a rear bucket with a compostable bag. Simple, with no electronics and nothing that can break. This is the style used by compact box-shaped models that fit under a bench.
Composting toilet with agitator
This adds a drum with a crank that mixes the solids with the substrate. It speeds up the process and lets you go longer between emptying, at the cost of more space and a higher price. It makes sense if you live in your van for many months of the year.
Portable chemical toilet
The classic porta-potty. It’s still the cheapest option and the easiest to find at any camping store. It’s a good choice if you take short weekend trips and always pass near a service area.
What to consider before deciding
- Space. This is the key factor. Measure the space where it will go before looking at catalogs, especially if it needs to fit under a bench or inside a cabinet.
- Liquid tank capacity. This is the first tank to fill up. Below 5 liters, you’ll need to empty it almost daily if there are two of you.
- The substrate you plan to use. Compressed coconut fiber takes up very little space and goes a long way, sawdust is cheap but bulky, and peat smells nice but is the least sustainable.
- Real comfort. A toilet that’s too low won’t get much use. Try sitting at the right height before you buy.
- What you’ll do with it when you’re not using it. Almost no one thinks about this, and it’s the biggest nuisance afterward.
The detail no one thinks about until it becomes a problem
A dry toilet spends most of its time unused, taking up visible space in an area where every inch counts. That brings two inconveniences you won’t find in any product description: it’s exposed to dust and moisture, and it’s a dead weight in the middle of the living space.
You can solve both at once with a camper dry toilet cover: it keeps the toilet clean between uses and turns that space into a pouf to sit on. We make ours from the same three-layer technical fabric as our waterproof seat covers, so it’s just as durable. We’ve added high-density HR foam to make it genuinely useful and turn it into a comfortable pouf to sit on.
Once it’s installed and ready to use, the next step is worth considering: how to maintain it and where to store it so it doesn’t become a nuisance.
So, which one is right for you?
If you take weekend trips and don’t mind planning your stops, a portable chemical toilet will do the job and is the cheapest option. If you spend weeks away, travel to places with few facilities, or simply don’t want to rely on a map of disposal points, a simple-separation dry toilet offers the best balance of price, size, and independence.
Whichever you choose, it’ll become as much a part of your van’s interior as your camper blanket or the rest of the camper accessories you already take with you.
It’s worth choosing carefully!
