Separett Villa Extend Urine Diverting and Composting Toilet

The Ultimate Waterless Composting Toilet for Everyday Living

Experience total freedom and convenience with the Separett Villa Extend, the next evolution in waterless, urine-diverting toilets—perfect for both off-grid adventures and permanent homes. Designed with unlimited capacity, this innovative toilet performs flawlessly in both continuous and alternating use, making it ideal for cabins, cottages, RVs, or full-time residential living.
With its smart external chamber design (external container sold separately), the Villa Extend lets you customize your setup to suit your needs. You can connect it to any suitable container, or choose the official Separett 13-gallon External Container Kit for an easy, worry-free experience. This design allows you to extend the time between emptying, keeping maintenance to a minimum while maximizing comfort and performance.

Upgrade your off-grid comfort with the Separett Villa Extend—the most reliable, simple-to-use, and eco-friendly toilet you’ll ever own. Whether for your remote getaway or your everyday home, it’s the ultimate balance of sustainability, design, and performance.

Features: 

• Unlimited Capacity: Perfect for both seasonal and year-round use, with no limit on daily use.
• Silent & Odorless Operation: The built-in 12V fan provides continuous ventilation, keeping your toilet space fresh at all times.
• Urine-Diverting Technology: Reduces odor and waste volume while simplifying composting.
• Energy Efficient: Operates on standard 110–240V AC or 12V DC (solar/battery compatible). Consumes just 0.06 kWh per day, ideal for off-grid setups.
• High Reliability: Engineered for simple installation, long-term reliability, and minimal maintenance. Occupies no more space than a standard toilet seat.
• Hygienic Design: A discreet view screen hides solid waste and automatically retracts when you sit down.
• Powerful Ventilation: Supports installation lengths up to 20 ft with up to three 90° bends, offering exceptional flexibility.
• Sustainable Comfort: 100% water-free and eco-friendly, reducing environmental impact without sacrificing convenience.
• 5-Year Warranty: Backed by Separett’s reputation for quality and durability.

Included with your Purchase: 

• Separett Villa® Extend toilet, 12V / 110-240 V
• User and installation manual
• Universal adapter for power socket
• Straight connector piece to fit the 90° elbow
• 90° bend for Ø3” schedule 20 or 40 PVC ventilation pipe
• 1.47” long Ø3” schedule 20 PVC pipe for simple ventilation installation through the wall
• Insect net and rain cap for Ø3” schedule 20 or 40 PVC ventilation pipe
• Indoor flashing for Ø3” schedule 20 or 40 PVC ventilation pipe
• 6.6 ft white urine hose Ø1 1/4" to lead out the urine
• Indoor flashing for the Ø1 1/4” urine hose
• 90° elbow for the Ø1 1/4” urine hose
• Straight connector for the Ø1 1/4” urine hose
• Silicone strip to seal the bottom of the toilet
• Wall mount for attaching the toilet
• 2 x wall mount to attach the urine hose
• Screws for mounting the toilet to the wall
• Installation template – has markings for drilling holes and attaching the toilet

Installation Instructions: 

The external container

Villa Extend needs to be connected to an external solids container that is placed under the toilet area. Keep in mind that the space underneath the toilet needs to be accessible from the outside to facilitate emptying. In the delivery of the toilet no external container is included. The Separett Extend Container Kit is available separately. When purchasing the accessory package, two external latrine containers of 13 gallons, 39 inches of drainpipe Ø 6.3 inches, connecting part to the latrine container, a lid with a hole, a solid lid and the necessary screws are included.

With the Separett Villa Extend Container Kit the minimum required clearance under the floor is 2.6 ft. This means from ceiling to the floor of the space underneath the toilet.

Toilet placement

Separett Villa has no requirements for room temperature and works in both cold and warm spaces. The only requirements are that you must be able to lead the urine away and fit a ventilation pipe.

The toilet is made to be placed on the floor against the wall, and for extra stability it should be attached to the wall.

Drill holes according to installation template

The installation instructions show possible installation options for urine drain and ventilation pipe through the wall, the ceiling or the floor. The installation template shows the places for holes in a simple installation through the wall behind the toilet. 

Install ventilation pipe

The toilet is designed for 3" schedule 20 or 40 PVC ventilation pipe. Separett Villa can be installed with up to 19 ft 8¼ inch of ventilation piping and three 90-degree bends. Ventilated air can go through a wall, floor or ceiling, for example, up into an attic and out through a suitable side of the house. If there is already a ventilation pipe present from a previous toilet installation, the toilet may be connected to that duct, provided that it is not smaller than 3" and that it meets the piping requirements.

The toilet comes with a coupling for connecting the toilet to 3" inch piping schedule 20 or 40 PVC.

Install urine hose

The toilet is delivered with a 6.6 ft urine hose. To connect this to the toilet, use the included straight joint or the 90-degree elbow.  It is possible to connect the urine tube so that no pipe is visible where the toilet is installed. This is achieved by angling the 90-degree elbow downwards or using the straight connection leading the pipe out through the wall behind the toilet.

Recommendations for installation of urine hose

Villa provides the option of installing the urine hose without any visible pipes/tubes in the bathroom. Below are a few tips that should be followed to maintain a well-functioning urine outlet over time and all year round.

• If you are going to go through an insulated wall or a wall with an air gap between the inner and outer wall, you must use a pipe for the penetration, or lead the hose through a pipe. Pipes are used to reduce the risk of pests causing damage to the tube.
• If you are going to run the urine a longer distance than the 6.6 ft of the supplied hose, you should switch to a pipe after the 6.6ft. Since urine contains minerals that can accumulate in pipes/ hoses, we recommend that the subsequent pipe have an internal diameter of at least 1.5" to avoid blockages.
• Make sure that you always have a downward inclination of at around 2 degrees (0.8 inch per 40 inch) throughout the piping, also make sure that there are no air pockets created by bends in the hose.
• If the toilet is to be used in winter, outdoor pipes must have an internal diameter of at least 1.5”.
• If the toilet is to be used in winter, we recommend that you insulate outdoor pipes with pipe insulation. This insulation can be bought in most DIY stores.
• An important rule for longer installations (over 6.6ft) is that the sooner you switch to pipes with a larger diameter, the lower the risk of blockages in the pipes.
• Do not place pipe joints near electrical appliances or wall sockets. This is to prevent liquid from coming into contact with electricity in the event of a leak

Specifications:

• Capacity: Unlimited - Empty when needed
• Product weight: 28 lbs
• Package weight: 34 lbs
• Max user weight: 330 lbs
• Product measurements: L 26.5" W 18.5" H 21.3"
• Box measurements: L 27.7" W 18.7" H 23"
• Seat height: 17.3"
• Seat width (seat ring): 14.2"
• Seat depth (seat ring): 16.5"
• Material: Polypropylene (PP), high gloss, recyclable
• Emptying interval with 4 users (liquids): When the container is full (if used)
• Emptying interval with 4 users (solids): When the container is full (if used)
• Energy consumption: 0.06 kWh / 24 h
• Power adapter: 110-240 V universal adapter
• Total effect: 12 V / 2.5W / 210 mA
• Voltage: 12 V
• Ventilation duct: ⌀3" (sch 20 or40 PVC)
• Urine pipe: ⌀1 1/4"
• Noise level in use: less than 30 dB(A)

Handling the Solid Waste: 

Many people dispose of toilet waste the same way they would dispose of diapers, but it’s also possible to compost it into nutrient-rich compost.

Keep in mind that the waste is not composted when you empty the bucket. Human waste should be composted for at least 6 months, preferably 12 months, to ensure pathogens are eliminated. Mixing garden waste, kitchen scraps, and toilet waste helps speed up the process and improve the result. A good rule of thumb is to plan for at least 30 gallons (110 liters) per user, using two containers so one can rest while the other is in use.

Always use a sealed bin or a container with a collection tray to prevent leaching. Make sure it has a solid lid and secured ventilation grates to keep out rodents, insects, and rain.

No need for an agitator or bulking material

Many composting toilet models on the market include an agitator. However, effective composting requires significantly more volume and higher temperatures than what these compact toilets provide, making an agitator unnecessary in units of this size.

Agitators also introduce components that come into direct contact with waste, making them harder to clean and increasing the risk of mechanical failure.

Separett toilets remain odorless thanks to an efficient ventilation fan, without the need to add bulking material or stir the contents. In fact, adding bulking material to the solids container can cause it to fill up faster and may even damage the fan, as fine dust particles can be drawn into the ventilation system.

Handling of the Liquid Waste: 

Many users connect the urine outlet from Separett Villa to a greywater system, a soakaway, or a sealed urine container for later disposal. However, urine can also be reused as a valuable fertilizer. When diluted with water at a 1:8 ratio, for example using the Separett Ejectortank, it becomes a safe and nutrient-rich fertilizer suitable for non-edible plants. Urine contains nitrogen, phosphorus, and potassium, all essential for healthy plant growth.

If storing urine, use a closed container and empty it regularly to avoid odor. Never allow urine to run directly onto the ground without proper treatment like a soakaway. A simple soakaway can be made by digging a pit about 24–40 inches (60–100 cm) deep, filling it with gravel or stones, and placing a perforated pipe into the center. Cover with a breathable layer to prevent blockages and odors.

Always follow local regulations when handling greywater or using urine as fertilizer.

Downloads: 

Separett Villa Extend user manual and installation guide

Separett Villa Extend installation template