The Compact Urine Separator Diverter is handmade in Wales from solid 4mm ABS plastic — the smaller of our two separators, built to the same proven design that Free Range Designs has been perfecting for over 20 years. Its compact footprint makes it ideal for self-build toilet boxes with a tighter seat aperture, campervans, dry toilets, glamping setups, and any off-grid build where space is at a premium. Available in black or white.
Odour-Free Results — Composting Toilet or Dry Toilet
Urine separation is the single most effective upgrade you can make to a composting toilet or dry toilet. By diverting liquid waste away from solids, you eliminate the chemical reaction that causes ammonia smell, allow the solid waste to dry and compost properly, and dramatically reduce how often the system needs emptying. This compact urine diverter delivers all of that in a smaller form factor — equally at home in a self-build eco-toilet, a campervan, a tiny home, or a glamping cabin.
Handmade in Wales — Built to Last
Every separator we make leaves our workshop in Wales, UK, made from high-quality 4mm ABS plastic. ABS is exceptionally strong, fully recyclable, and gives the separator a high-gloss surface that resists build-up and wipes clean easily. A removable metal filter sits over the 30mm outlet hole to prevent pipework blockages, and the whole unit lifts off its mounting screws in seconds for a thorough clean.
Fits Standard Push-Fit Waste Pipe
The 30mm outlet connects directly to standard 1¼" push-fit waste pipe — available from any builders' merchant or plumbing supplier. Route the pipe to a soakaway, a small collection vessel, or a dilution tank for use as liquid fertiliser. No specialist fittings required — ideal for self-builders and off-grid DIY projects.
Specifications
- Width: 170mm
- Length: 283mm
- Depth: 128mm
- Outlet hole: 30mm external diameter
- Pipe connection: standard 1¼" push-fit waste pipe
- Includes removable metal filter
- Available in Black or White
- Dispatched within 24 hours
Frequently Asked Questions
Here are some common questions we've been asked over 20 years of selling urine separators.
Do you always have stock available?
Yes — we make the urine separators ourselves in our workshop in Wales, UK. This means we control production and never run out of stock.
How many designs of separator do you make?
We make two designs: the Compact Urine Separator and the Complete Urine Separator.
What features do the two separators share?
- The internal measurements of both separators are exactly the same — the funnel bowl size is identical, the outlet pipe has the same dimensions, and both are fitted with the same size metal filter.
- Both are made from the same high-quality 4mm ABS plastic.
What are the differences between the two separators?
The Compact Urine Separator is the original design we first made in 2009. It is smaller than the Complete Separator and fills around the front third of the oval space inside the toilet seat. It has a single hole for collecting urine, leaving the space behind open.
The Complete Urine Separator has a rim at the back and an additional opening for solid waste. This opening extends downwards, containing solid waste as it falls so it lands safely in the bucket and the inside of the toilet stays clean. The Complete separator fills the entire oval space inside the toilet seat.
The Complete Urine Separator is supplied pre-cut into an oval shape — no further cutting required. The Compact Urine Separator is supplied square with extra plastic around the funnel curve. You can use it exactly as it is, or easily cut it to a bespoke size using a jigsaw at the lowest speed.
What are the benefits of each separator?
The Compact Urine Separator is smaller and its position can be adjusted — moved slightly forwards or backwards inside the oval opening of the toilet seat — to capture the maximum amount of urine. The Complete Separator sits in one fixed position, as it fills the entire oval space.
The Complete Separator is larger and has a contained area at the back for solid waste, which helps keep the inside of the compost toilet clean.
What are the separators made from?
All Free Range Designs urine separators are made from solid 4mm ABS plastic, in either white or black. ABS is a very strong, durable material; it is also recyclable and easy to clean, with a high-gloss surface.
What pipe size do I need to connect to the separator?
The external diameter of the funnel outlet on both separators is 30mm. We therefore recommend a 32mm pipe, also sold as 1¼".
