Water-flushed latrine with trap
Letrina con sifón de agua (garderobe con descarga)
- Date
- c. 1200 · confidence low
- Place
- Cistercian abbeys and European castles; Baghdad and Córdoba (sewers)
- Credited to
- Monastic builders; Islamic hydraulic engineers
- Field
- Tools
⚠️ Disputed: the sources disagree.
What it is
Monastic and castle latrines positioned over channels of running water diverted from a river, and Islamic urban latrines connected to sewers with a water seal. Collective hygiene in large buildings.
The S-trap as a hydraulic seal dates from 1775; in the medieval period, 'flushing' meant continuous running water. Marked as disputed owing to terminological anachronism.
What it led to
- urban sanitation regulations (London, 1388)
- Harington's flush toilet (1596) and the modern trap (Cummings, 1775)
- 19th-century sanitary engineering
Built on
- Roman sewers
- Indus Valley latrines
Made possible
- Harington's toilet