Urinal for your composting toilet: Trelino, BOXIO, Kildwick, Separett
Wall-mounted waterless urinal for owners of separation toilets — Trelino, BOXIO, Kildwick, Separett, CompoCloset. Hangs on the wall next to the toilet, urine is collected separately in a canister. The composting chamber stays dry and is emptied much less frequently.
Why the liquid waste container overflows
In a separation toilet, the main volume is urine. Compact models have a small liquid waste container, and with two users, it fills up in a couple of days — it needs to be emptied too often. The construction itself works correctly, the problem is one: the container cannot keep up with the volume of liquid.
Pi-Pi solves exactly this: a man urinates standing, against the wall, and all his volume bypasses the toilet into a separate canister. Your separation toilet's container fills 2–3 times slower, the composting chamber stays dry, and emptying becomes a rare task.
Technical facts
- Weight 1.4–1.5 kg: mounts on any wall next to the toilet, including thin partitions
- Material LLDPE: operating range −40…+60 °C, suitable for unheated bathrooms, cabins, and vans
- Installation 5–7 minutes: no plumber, no special tools required
- Stepped nozzle Ø24/32/40 mm: connects to the outlets of Trelino, BOXIO, Kildwick, Separett, CompoCloset without adapters
- Standard: closed top, for installation without ventilation
- Standard Plus: top opening Ø70 mm for connection to existing ventilation of the separation toilet
What to do with collected urine
- Fertilizer: dilution 1:10 with water — feeding for tomatoes, cucumbers, and pumpkins in a greenhouse or garden bed
- In compost: 6 parts urine to 1 part peat accelerates decomposition and retains nitrogen
- For disposal: flat canister empties in a couple of minutes
Frequently asked questions
Will it fit my separation toilet?
Yes. The stepped nozzle Ø24/32/40 mm connects to the drainage of Trelino, BOXIO, Kildwick, Separett, and CompoCloset without adapters, and the top inlet Ø70 mm on Standard Plus connects to the standard ventilation.
Will there be any smell?
No. Ammonia smell occurs when urine comes into contact with feces; this does not happen in a separate urinal. The canister is rinsed with water every 1–2 weeks.
Pi-Pi complements your composting toilet — it doesn't replace it
You already run a Trelino, BOXIO, Kildwick, Separett or CompoCloset, and with two users the liquid container keeps overflowing. Pi-Pi doesn't compete with your toilet: it's a separate wall urinal, men use it standing, and all the urine bypasses the composting chamber — straight into a jerrycan or the existing vent. The composting chamber stays dry, the toilet handles only solids, and you empty it far less often.
- Trelino Origin / Evo: the Standard bottom outlet feeds the liquid jerrycan, the Ø70 mm top inlet on Standard Plus ties into the Trelino vent
- BOXIO Toilet: with two users the BOXIO jerrycan overflows in a couple of days — Pi-Pi adds a second circuit and clears the problem
- Kildwick, Separett, CompoCloset: drain into the liquid container, vent through Ø70 mm without an adapter
Seamless connection: the stepped outlet Ø24/32/40 mm meets the pipe already there, and the Ø70 mm top inlet on Standard Plus meets the existing ventilation duct without an adapter.
Have Questions?
Got a question? Message me — I'll help you pick the right model for your garden shed or toilet setup and sort out delivery. I respond within one business day.
Mart Tamm
Account Manager for United Kingdom
Have questions about products, pricing, or partnership? Email me directly — I'll respond personally.