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I already have a composting toilet — why add a waterless urinal?

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Because urine is what creates most of the volume — and most of the smell — in a composting toilet. Divert it into the urinal instead and the solids container stays drier, fills up 2–3× more slowly and smells far less. The whole setup becomes much more pleasant to live with.

That's the idea of "alongside, not instead of": the urinal doesn't replace your composting or separating toilet — it works with it and takes the hardest load off it. You'll find the models in the catalogue.

Related Questions

Yes — this is exactly what the Pi-Pi urinal is made for. It works with no water and no drain connection, so it fits perfectly into a garden shed, allotment plot, weekend cabin or off-grid hut with no mains plumbing.

How it works:

  • completely waterless — nothing to flush, nothing to connect
  • the stepped outlet Ø24/32/40 mm runs into a canister or holding container
  • urine is collected separately and can be diluted (about 1:10) and used as garden fertiliser, or simply emptied

What about the rules? Across Europe the principle is the same: liquid must not just soak away into the ground. Because the Pi-Pi urinal collects urine in a closed container, you stay on the right side of the rules — in the UK (allotment tenancy terms), as well as places like Germany (Kleingarten), the Netherlands (volkstuin) or Austria.

The Pi-Pi urinal works best alongside your composting or separating toilet (Trelino, BOXIO, Kildwick): the urine goes straight into its own canister, so the toilet's solids container fills up far more slowly and stays drier and less smelly.

Yes — and that's exactly what it's designed for. The Pi-Pi urinal screws to the wall alongside your composting toilet, not instead of it. It catches the urine separately and so takes the load off the toilet's container. Pi-Pi doesn't replace Trelino, BOXIO or Kildwick — it works with them.

  • Trelino Origin / Evo: run the stepped outlet Ø24/32/40 mm straight into the liquid canister or a second container. The top inlet Ø70 mm on the Standard Plus model connects to Trelino's vent pipe.
  • BOXIO Toilet: the 5-litre BOXIO canister fills up fast with two men. With Pi-Pi the men pee standing into the urinal — so the main canister fills 2–3× more slowly and stays less smelly.
  • Kildwick EasyLoo / MiniLoo: likewise — Pi-Pi runs into the liquid outlet or a separate tank.

Pick the model for your setup in the catalogue: Standard drains into a canister, while Standard Plus also connects to your dry toilet's vent via the Ø70 mm top inlet.

It's not just for men, though it's designed mainly for standing use — so for men and boys. And that's exactly where the benefit for the whole household lies: divert the men's and boys' urine into the urinal and the load on the shared composting or separating toilet drops dramatically, so it fills up less often and smells less.

For women who'd like to use it standing, portable funnel adapters are available and work perfectly well with this kind of urinal.

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

Mart Tamm

Account Manager for Estonia

Have questions about products, pricing, or partnership? Email me directly — I'll respond personally.