The principle
Separation and siting are everything. Solids and urine kept apart, every unit at least 10–15 m from any water source, vent stacks that actually draw. Volunteer induction before first use, always.
Materials
- Small tank (10–20L food-grade)
- flexible hose
- tap/valve
- soap dispenser
- wooden drainboard
- soak-away basin
Tools
- Drill
- wrench
- saw
- hand file
- clamp
Reclaimed from
Small plastic drum + old soap pumps + tin cans + timber shelving + cast-iron brackets