By Sarah Chen · environmental engineer · water, waste and everything that flows downhill
“After three failed attempts at sealing a Victorian septic, I finally cracked the urine diversion code with just one $15 gasket.”
— Sarah. Every litre accounted for.
ArticlesCalculatorsSite PlannerShopI learned the hard way in South Australia when I tried to build a urine‑diverting toilet with a 20 L food‑grade bucket and a homemade diverting seat. Within weeks the seal on the collection chamber blew, the urine pooled under the house, and the smell knocked the neighbours. That mess taught me that a proper vent, a secure mounting, and a sealed container are non‑negotiable. Below is the method that actually works, with the parts you can source in Australia and the prices I paid.
By Sarah Chen · environmental engineer · water, waste and everything that flows downhill
“After three failed attempts at sealing a Victorian septic, I finally cracked the urine diversion code with just one $15 gasket.”
Urine diverting toilets are the practical choice for off-grid setups in Australia. They slash water consumption, convert waste into a resource, and sidestep the odour issues common with composting models. This guide covers the correct installation method alongside current Australian pricing and verified local suppliers.
UDTs split waste at the source: urine goes to a tank, solids go to a compost bin. No mixing, no smell. AS/NZS 1547:2020 says this is safe for on-site treatment when done properly.
Don't wing it. Key steps:
Urine is sterile when fresh. But leave it in a tank for weeks? It smells. Fix it:
Urine is 95% water, 5% nutrients (NPK). Perfect for veggies. Mix 1:10 with water (1 part urine, 10 parts water) before using. Never use straight. Burns plants.
Best for: Tomatoes, capsicums, beans. Avoid for leafy greens (too strong). Test on one plant first.