Best 10 Composting Toilets With Urine Separators for 2026: Top Picks for Off-Grid, RV, and DIY Setups

If you want a cleaner, lower-odor off-grid bathroom solution, a composting toilet with urine separator can make a big difference. Separating liquids from solids helps reduce smell, simplify maintenance, and improve overall performance.

Below, we’ve rounded up 10 strong options for RVs, cabins, homesteads, camping, and DIY builds, with choices for portable use, self-contained systems, and upgrade parts.

Best 10 Composting Toilet with Urine Separator Picks for 2026

Complete Wrap-Around Diverter – Full-Coverage Urine Separation for DIY Builds

If you want a composting toilet with urine separator that prioritizes dryness and simple maintenance, this wrap-around diverter is built for that job. It keeps liquid away from solids to support odor control, and the full-ring design is aimed at compact DIY bucket toilets, vans, and small off-grid builds where clean separation matters.

Best For: DIY bucket toilets, campervans, cabins, and compact seated composting setups that need full-opening coverage.

Pros:

• Continuous wrap-around coverage for more complete urine separation
• High-gloss ABS surface wipes clean quickly
• Removable stainless-steel filter helps stop debris clogging the outlet
• Fits standard 5-gallon buckets and can screw into a wooden surround

Cons:

• Designed for seated use only
• Requires installation with screws

For builders who want a straightforward diverter rather than a full toilet system, this is a practical component with a strong focus on odor prevention and easy cleaning. The 10-year guarantee also adds confidence for long-term off-grid use.

High-Capacity Off-Grid Toilet – Separett Villa Urine-Separating Design

For buyers comparing a composting toilet with urine separator for home-style off-grid use, the Separett Villa stands out for its high-capacity, waterless design. It uses urine-diverting technology and is meant to run without additives or mixing, which keeps the routine simple for homesteads, cabins, schoolies, and cottages.

Best For: Homesteads, cottages, converted school buses, and remote living spaces that need a larger-capacity toilet.

Pros:

• Waterless operation with urine-separating compost system
• No additives or mixing needed
• High-capacity design for longer use between emptying cycles
• Suitable for multiple off-grid living applications

Cons:

• Wall-mounted installation may not suit every layout
• Larger footprint than bucket-style diverters

This is the most complete toilet in the group if you want a self-contained solution rather than a separate diverter. Its main appeal is capacity and low-maintenance operation, especially where plumbing is not available.

Easy-Fit Diverter – Frienda Urine Separator with Sink Lid

If you are looking for a composting toilet with urine separator that is easy to add to a bucket or toilet setup, this Frienda diverter focuses on simple installation and odor control. Its continuous-ring fit and compact ABS construction make it a practical choice for basic compost toilet builds where easy cleaning is a priority.

Best For: Bucket toilets, basic composting toilet installations, and users who want a simple urine-diverting add-on.

Pros:

• Designed to separate urine and solid waste effectively
• Odor-locking focus helps reduce unpleasant smells
• Simple structure is easy to clean
• Includes a sink lid and fits under the toilet seat hole

Cons:

• Product size may be limiting for some seat layouts
• Sold as a single piece, so it is not a full toilet system

This is a straightforward add-on for buyers who want the benefits of urine separation without moving to a full composting toilet. It is best suited to uncomplicated installs where convenience and hygiene matter most.

Compact Self-Contained Toilet – Nature's Head Spider Handle Design

When you want a composting toilet with urine separator in a self-contained format, Nature’s Head is built around straightforward off-grid convenience. It is designed for easy installation, odor control, and a large capacity that the brand says can support two people using it full time for 4 to 6 weeks before emptying.

Best For: RVs, boats, tiny spaces, and off-grid users who want a self-contained toilet with minimal upkeep.

Pros:

• Self-contained design simplifies off-grid use
• Brand states absolutely no odor and no maintenance
• Large capacity with 4-6 week emptying interval for two full-time users
• Easy to install for a reasonably handy person

Cons:

• More expensive and larger than a simple urine diverter
• Installation is still required, even if straightforward

This model makes sense if you want a complete toilet rather than a component piece. Its main strengths are capacity, ease of use, and direct support from the maker, which can matter a lot in close-quarters living.

Large DIY Urine Diverter Kit – Upgraded Wrap-Around Separator

If you want a composting toilet with urine separator that’s easier to build into a custom setup, this upgraded DIY kit is aimed at comfort, cleaner separation, and straightforward installation. The extra-large opening and wrap-around shape are designed to reduce contact and help keep solids from sticking, while the included hose and template simplify the build process for RVs, boats, cabins, and other off-grid projects.

Best For: DIY builders who want a larger, more comfortable urine diverter for custom compost toilet installations.

Pros:

• Large 365 × 276 mm opening for a more comfortable fit and less mess
• Mirror-finish ABS surface is non-stick and easy to rinse clean
• Includes a stainless steel sink lid, drain hose, and cutting guide sticker
• Useful for bucket toilets, permanent installs, RVs, boats, and tiny houses

Cons:

• Requires DIY cutting and assembly rather than drop-in installation
• Best suited to users comfortable building or modifying a toilet setup

This is a practical pick if you want to save money by building a custom compost toilet with urine separator components instead of buying a full pre-made unit. The size and included template make it especially appealing for anyone prioritizing comfort and easier maintenance.

Off-Grid Self-Contained Toilet – Weekend Prime Urine-Separating Design

For anyone looking for a composting toilet with urine separator that works without electricity, water, or plumbing, the Separett Weekend Prime is built for remote use. It uses internal urine diversion, runs fully manually, and is designed for off-grid shelters, wilderness cabins, camps, and emergency backup setups where simplicity matters more than features.

Best For: Remote off-grid locations and emergency sanitation where non-electric operation is essential.

Pros:

• Fully manual design with no fans, power, or ventilation needed
• Internal urine diversion helps separate liquid and solid waste
• Compact, durable construction with no moving components
• Comes with solids container, liquid container, biobag samples, and manual

Cons:

• Urine tube for external handling is optional and sold separately
• Solids bucket lid is also optional for users who want it

This model makes sense when you need a self-contained sanitation solution that can operate reliably in harsh, power-free environments. It’s less about customization and more about dependable, ready-to-use off-grid performance.

Heavy-Duty Bucket Diverter – Throne DIY Urine Separator

If you’re building a composting toilet with urine separator around a 5-gallon bucket, the Throne diverter is designed for broad compatibility and easy cleanup. Its wide funnel, deep liquids bowl, and smooth contours aim to keep solids dry and reduce odor, while the included plans and template make it easier to assemble a complete DIY system.

Best For: DIY bucket-toilet builders who want a sturdy, easy-to-clean urine diverter with included plans.

Pros:

• Wide liquids funnel and deep bowl help reduce splashback and misses
• LLDPE construction is thicker and more durable than standard ABS
• Smooth, non-porous surface rinses clean quickly
• Fits 5-gallon and 6-gallon buckets plus common toilet seats and jugs

Cons:

• Designed for DIY systems, so it is not a complete standalone toilet
• Large size may be more than some compact setups need

This is a strong option if durability and easy cleaning matter more than a fully finished bathroom appliance. The included plans add value for first-time builders, especially those wanting a practical bucket-based compost toilet setup.

Portable Urine-Diverting Toilet – TROBOLO WandaGO Composting Toilet

If you want a composting toilet with urine separator for camping or van travel, the TROBOLO WandaGO is built for portability and simple use. It combines a compact footprint with an adjustable seat height, so it can fit tighter spaces while still feeling more natural to sit on.

Best For: Campervan, RV, and outdoor users who want a lightweight, travel-ready composting toilet with a built-in urine separator.

Pros:

• Compact and lightweight at 10.4 lbs, making it easy to move and store.
• Adjustable seat height at 12.0″ or 17.2″ for better comfort.
• Separates urine and solids without water, chemicals, or electricity.
• Firmly closing lid, fastening system, and spill protection add travel security.

Cons:

• Smaller container sizes mean it needs emptying after limited use cycles.
• Portable design may not suit buyers wanting a fixed home installation.

Overall, this is a practical composting toilet with urine separator for people who prioritize mobility, comfort, and odor control in a compact package. The built-in level indicator and hygienic urine diverter holder also make day-to-day use easier on the road.

DIY Urine Diverter Kit – Xastro Large Composting Toilet Insert

For builders who want a composting toilet with urine separator without paying for a full pre-made unit, this Xastro DIY kit gives you the core diverter hardware and accessories. It is aimed at custom installations where you can match the toilet height, space, and layout to your own setup.

Best For: DIY RV, cabin, boat, and off-grid projects that need a large urine diverter kit with installation tools included.

Pros:

• Large 365x276mm opening for a more comfortable seating area.
• Mirror-finish ABS surface is designed to be durable and easy to clean.
• Includes a cutting guide sticker, discharge hose, and metal filter screen.
• Works well as a budget-conscious base for a custom dry toilet build.

Cons:

• Toilet seat is not included, so you must source the rest of the setup separately.
• Holes are not pre-drilled, so some DIY work is required.

This is a solid option if you want the urine-separating part of a composting toilet system and plan to build around it. The included template reduces guesswork, but it still makes sense for hands-on buyers who are comfortable with basic installation.

DIY Composting Toilet Set – TROBOLO Urine-Diverting Kit

If you want a composting toilet with urine separator and prefer to build it yourself, this TROBOLO set gives you the main parts in one box. It is designed for users who want a compatible, straightforward DIY dry toilet setup with urine and solids kept separate.

Best For: DIY buyers who want a complete urine-diverting toilet set with containers and flexible drainage options.

Pros:

• Includes urine diverter, solids container, and liquids container for a complete DIY start.
• No water, chemicals, or electricity required for odor-free separation.
• Adapter system lets urine drain into the liquids container or externally via hose.
• Compatible with standard toilet seats for flexible installation.

Cons:

• Still requires you to build the surrounding toilet structure.
• Not as ready-to-use as an all-in-one portable unit.

For DIY users, this kit simplifies the hardest part of a composting toilet with urine separator by bundling the diverter and containers together. The flexible adapter design makes it easier to adapt to different layouts while keeping the system sanitary and odor-free.

How We Picked the Best Composting Toilet with Urine Separator

We focused on separation performance, ease of cleaning, capacity, installation flexibility, and suitability for real-world use. For a Composting Toilet with Urine Separator, the best options balance reliable urine diversion with practical maintenance and a layout that fits your space.

Quick Comparison

Think in three categories: complete toilets for plug-and-use simplicity, portable models for travel and short stays, and DIY diverters for builders who already have a bucket or custom enclosure. Capacity, power requirements, and drainage setup are the biggest differences to compare first.

Key Buying Factors for a Composting Toilet with Urine Separator

Separation Design

Look for a well-shaped diverter that directs liquid away quickly without splashing or pooling. A good fit at the opening matters as much as the material itself.

Capacity and Usage Frequency

Higher-capacity systems are better for full-time living, families, or shared spaces. Smaller portable units can work well for weekends, backup use, or occasional camping.

Cleaning and Drainage

Easy access to the separator, smooth surfaces, and a simple drain hose setup all reduce upkeep. If cleaning is difficult, the toilet will be less pleasant to use over time.

Power and Installation

Some units are non-electric and better for off-grid setups, while others use fans or other features that improve odor control. DIY kits are ideal if you want to customize the build around an existing bucket, cabinet, or enclosure.

Who Should Buy Which Composting Toilet with Urine Separator?

If you want a finished bathroom solution, choose a self-contained model. If you’re outfitting an RV, van, or tiny home, a compact non-electric option may be the easiest fit. If you already have a setup and want to improve hygiene and odor control, a separate urine diverter kit is often the smartest value. For the most flexible off-grid build, a Composting Toilet with Urine Separator gives you more control over space, drainage, and maintenance than a traditional toilet alternative.