Campervan toilet space planner
Will the toilet fit and can you still remove the container?
Waterless toilet guides for the UK and Europe
Choose the right waterless toilet for your campervan, boat, cabin or allotment — and empty it lawfully.
A composting or separating toilet is a big decision for an off-grid space: it affects the space you lose, how often you service it, the running cost, and what you are legally allowed to do with the waste. These guides help you pick a type, size it, and install and empty it lawfully in the UK or Europe.
Find the right type of toilet
Three picks. One decision.
Make room for the trip, not a toilet renovation
Space, container access, and a routine you can maintain: see why Trelino Evo M leads our weekend-van shortlist, and when WandaGO or BOXIO fits better.
Find your campervan toiletStart with your installation
Where will you use it?
Free browser tools
Check a plan with your own measurements
Off-grid toilet chooser
Which toilet categories deserve a closer look for your installation?
Off-grid toilet ownership-cost comparison
How do the toilet options compare over the years you will own them?
Popular guides
Start with the guides that answer the most common questions
Campervans
Waterless toilets for campervans: what to check before buying
Planning a waterless campervan toilet? Check seated space, container removal, travel fixings, fan power and disposal before choosing a system.
Remote sites
Waterless toilets for cabins, garden rooms and allotments
Plan a waterless toilet for a cabin, garden room or allotment: permissions, peak use, winter conditions, ventilation and access for servicing.
Boats
Waterless toilets for boats: installation and servicing checks
Considering a waterless toilet on a boat? Check heel, containment, service access, ventilation, fan power and marina disposal requirements.
Beyond the installation
Space is only the start — plan how it will be used and emptied.
Space is not enough on its own. How often you visit, who uses the toilet and how you empty it all shape a workable setup.
Read the cabin planning guideRunning cost and servicing
What it really costs to run, ventilate and service.
Ventilation, servicing and running costs matter long after the installation is finished.
Portable toilet comparison
Best portable composting toilet for a campervan: keep the trip simple
Keep your campervan toilet setup simple. Compare Trelino Evo M, TROBOLO WandaGO and BOXIO by usable space, container access and the routine you can maintain.
Capacity planning
Waterless toilet capacity: estimate a realistic emptying interval
Estimate waterless toilet capacity and emptying intervals from users, peak demand, separate waste streams, reserve capacity and disposal access.
Campervan toilet service access
Before building toilet furniture, rehearse the whole service job
Check hands, tools, removable panels and component routes before permanent campervan furniture makes toilet servicing awkward.
Toilet operation and fault diagnosis
Changed toilet odour: decide what to check and when to stop
Use a model-specific fault record to check operation and the ventilation path, recognise unresolved faults, and prepare a useful support request.
Campervan toilet power planning
Put your toilet fan into the campervan’s daily battery budget
Convert a continuously running toilet fan into daily watt-hours, then include it in a realistic campervan trip budget using the fan calculator.
Off-grid toilet trip planning
How much toilet cover material should you pack for a trip?
Turn a measured scoop, expected solids uses and fresh-bag allowances into a cover-material packing plan with visible assumptions.
Occupancy and service records
Keep a first-month toilet log that separates routine from capacity
Record occupancy, separate service events and the reason each container was changed, then choose a provisional routine without overstating capacity.
Toilet location and restraint
Fixed or removable toilet: decide who moves it, and when
Choose a toilet location by separating travel restraint, everyday access and intentional removal, then check the exact manufacturer's instructions.
Ownership cost planning
Which toilet cost assumption could change your decision?
Use ownership-cost scenarios to find the usage threshold and uncertain inputs that could change your choice, with clearly hypothetical arithmetic.
Separating toilet cleaning and care
Clean a separating toilet with a component-by-component plan
Turn the exact toilet manual into a practical cleaning card for the separator, liquid container, solids container and small parts.
Everyday use
Make a separating-toilet guest card people can follow
Turn the operating instructions into a short, model-specific guest card, with a Trelino example and a practical check before visitors arrive.
System types
Separating vs composting toilets: differences that matter
Compare separating and composting toilets: waste handling, storage, maintenance and what to ask suppliers before choosing an off-grid system.
Separating toilet servicing
Plan a spare urine container around a clear rotation routine
Choose the correct spare bottle and closures, record which container is ready, and set a trip limit without treating storage as disposal permission.
Installation space planning
Make a toilet measurement sheet that includes opening and removal
Measure the closed footprint, lid movement, container removal and access route before committing a van, boat or cabin layout.
Off-grid toilet installation procurement
Check the evidence behind your toilet parts order
Turn an off-grid toilet installation checklist into a parts order with confirmed kit contents, matched connections and clearly held items.
Buying reviews
Trelino Evo M review: does it fit your campervan routine?
A research-based Trelino Evo M review covering space, container access, Standard versus Plus+, servicing and the checks to make before ordering.
Running costs
Waterless toilet running costs: build a complete ownership budget
Compare waterless toilet running costs, including consumables, fan electricity, servicing, disposal and replacement parts as well as purchase price.
Installation
Waterless toilet ventilation: plan ducts, fans and power
Plan waterless toilet ventilation from the exact model manual: duct routing, fan power, outlet position and access for inspection and maintenance.