How to Install a Nature’s Head Composting Toilet in a Van

Last Updated: July 24, 2021

How to Install a Nature’s Head Composting Toilet in a Van

Natures-Head-Composting-Toilet-Installation-Van-Heading

We plan on living full time for a year or two in the van. For a minimum of comfort (and convenience), we really wanted a toilet. And after reading about Nature’s Head composting toilets, it seems like the perfect solution for us!

 

 

The present article covers the installation of the Nature’s Head composting toilet in our van. If you want to learn more about it (pros/cons/emptying frequency/what we like/don’t like/etc.) please head over here for our review:

 

 

 

TIME SPENT ON THE JOB: 20 hours

 

TOTAL COST : $1200 USD (that’s a shitload of money to take a dump, but it’s so worth it!)

 


DISCLOSURE: This post contains affiliate links, which means that if you click a product link and buy anything from the merchant (Amazon, eBay, etc), we will receive a commission fee. The price you pay remains the same, affiliate link or not.

Portrait


 

 

 

MATERIAL:

 

TOOLS:

 

RESSOURCES:

 

PRE-REQUISITE:

  • Get your sh*t together

 

ALRIGHT, LET’S GET THIS SH*T DONE!

First of all, our Nature’s Head composting toilet is hidden in our couch just behind the driver’s seat:

Composting Toilet Installation Camper Van Conversion (1)
That’s the idea…

 

Installing the Air Exhaust

There is no black water or whatever to install with the Nature’s Head, but there is, however, an AIR EXHAUST. The air exhaust will ensure that absolutely no odor leaks in the van by constantly pulling a very small volume of air from inside the toilet towards the outside world. There is a very small fan (computer-like) that runs at all times; that’s no big deal as it draws just about 0.1 amp. We decided to pass our air exhaust through the floor near the B-Pillar, inside the wall cavity. We got the idea from CargoVanConversion.com, although he is using it as his main van passive intake.

We need to get inside this cavity:

Composting-Toilet-Installation-Camper-Van-Conversion-(39)
Air Exhaust Passage

To access the cavity, we cut a door through the Ez-Cool (you can read our EZ-Cool Installation Article here):

Composting Toilet Installation Camper Van Conversion (40)

 

Behind the Ez-Cool “door”, we drilled a 2-3/8″ diameter hole through the van floor using a hole-saw (Buy on Amazon):

Composting Toilet Installation Camper Van Conversion (44)
Inside the door…

 

Of course, to prevent corrosion, we sanded the bare edges of the hole and touched them up with primer+paint+clear-coat:

Composting Toilet Installation Camper Van Conversion (43)
Corrosion is for other’ vans, not ours.

To prevent the composting toilet exhaust from being sectioned by the hole edges, we improvised something out of a MLV leftover (what’s MLV? See our Floor Installation Article!). Note that a grommet would have been much better, but we did note have one handy…

 

Composting Toilet Installation Camper Van Conversion (54)
The “triangle” shapes of the MLV are in contact with the hole edges

 

Now let’s get under the van on the driver side where this arrow is pointing:

Van-Side
Here!!

 

 

We can see the exhaust passing through the hole in the floor!

Composting Toilet Installation Camper Van Conversion (49)
MLV is not shown in this picture.

 

To prevent critters from crawling into our toilet (huh), we installed some wire mesh and mosquito screen (not shown in the picture) on this plastic part (included with your Nature’s Head Toilet):

Composting Toilet Installation Camper Van Conversion (47)
The Mosquito screen is not shown in this picture, but it’s very important!!

 

Then we just pulled the exhaust out (from the hole in the floor) and press-fitted the plastic part:

Composting Toilet Installation Camper Van Conversion (51)

 

The plastic-part is bolted in the upper-left hole of the van’s vent passage (there is a hole in the van. no need to drill):

Wire-Mesh-and-Mosquito-Screen

 

That’s it for the exhaust! Here we are at this point:

Composting Toilet Installation Camper Van Conversion (20)
Note that we don’t pass the exhaust through the Ez-Cool “door”. It passes just behind the toilet so we don’t see it…

 

Installing the Composting Toilet

We like our Nature’s Head, but it still has to be hidden. We built a couch with a removable lid and a nice cushion for that job!

Note: When designing your toilet installation, remember that to empty the compost, the upper part of the toilet must be removed. To do so, the upper-part rotates around the hinges in the back and then it is pulled left. Make sure your enclosure has enough clearance around the toilet to allow this movement!

The upper-part rotated around the hinges in the back
Then the upper-part slides about 2 inches to the left

 

Here is the base of the couch:

We kept things simple…

 

The base holds with corner braces and glue

 

 

The lid is built the same way as the base, except that we glued a 3″ thick cushion on top (with 3M 90 Spray Adhesive Buy on Amazon) and covered it with fabric.

The cushion is glued with 3M 90 Spray Adhesive, so it doesn’t slip away

 

At this point, hand over the lid and the cushion to your mother-in-law and LET THE MAGIC HAPPEN!*

*Thank you SO MUCH!

It’s magic!

 

The fabric is held with Velcro, so it can be removed and washed:

Lid Velcro

 

The lid is held to the base with a small “bracket” we made:

Compostion-Toilet-In-Van-Couch-(3)
The lid fits nicely on the base!
Compostion-Toilet-In-Van-Couch-(4)
Here is a look inside

 

Compostion-Toilet-In-Van-Couch-(12v)
Dump & Recharge Station

 

Connecting the composting toilet fan to the electrical system

You can download our Wiring Diagram & Tutorial here:

Interactive-Wiring-Diagram-(V4-REV-B)-1024
Wiring Diagram & Tutorial PDF Download

 

Later on, we also added a sensor to monitor the liquid level on our Simarine Pico monitor. Full Simarine Pico installation write-up here: faroutride.com/simarine-pico

Natures Head Composting Toilet Liquid Tank Level Sensor Simarine Pico (silicone screws)
Tank Level Sensor
Simarine Pico Tanks (500px)
Simarine Pico Monitor

 

At last, fill the composting toilet with coco (or peat moss):

Composting-Toilet-Installation-Camper-Van-Conversion-Coco

 

And here are the dimensions:

24″ Height x 24″ Width x 23″ Depth

 

And here is a happy man:

Composting Toilet Natures Head Man in a Van

 

As mentioned previously, the small exhaust fan is running continuously. No big deal, as it draws just about 0.1A…

Composting-Toilet-Electrical-Draw-Cropped-01
Exhaust Fan Electrical Draw

 

 

 

ON SECOND THOUGHT

Before living full-time review:

At the time of writing this we don’t live in the van full time yet, but we used the toilet for a few weekend trips. So far, so good! We haven’t emptied the toilet since we first used it (about 3 months ago): there is no odor, and we think the Nature’s Head Composting Toilet is THE SHIT!!

First month on the road review: 

(The following text is extracted from faroutride.com/first-month/)

We would definitely install it again if we had to do it over. You might get away without it for weekend trips, but for full-time living it’s just so-much-better. We empty the liquid tank every 3 or 4 days if using the composting toilet exclusively, or every week if using other toilets. We’re getting between 2-4 weeks autonomy for solid waste depending on the temperature (cold slows down composting action) and depending on if we use other toilets occasionally.

We bought compressed coco fiber (Buy on Amazon) because it’s MUCH more compact to carry than normal coco fiber! This block is 5in x 11in x 11in and equals to about 3 cubic feet!

Kempf Compressed Coco Coir. Buy on Amazon.

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About-Us-Narrow

Hello! We’re Isabelle and Antoine 🙂 In 2017, we sold our house (and everything in it), quit our engineering careers, and moved into our self-built campervan. We’ve been on the road since then, and every day is an opportunity for a new adventure; we’re chasing our dreams, and hopefully it inspires others to do the same!