Before revision: 1. float, 2. fill valve, 3. lift arm, 4. tank fill tube, 5. bowl fill tube, 6. flush valve flapper, 7. overflow tube, 8. flush handle, 9. chain, 10. fill line, 11. fill valve shaft, 12. flush tube|221x221px Basilica Cistern, Istanbul, 138 x 65 meter, 80,000 m3; Justinian I A rain barrel is a form of small cistern The modern water closet (WC) or toilet utilises a cistern to reserve and hold the correct amount of water required to flush the toilet bowl.
After revision: 1. float, 2. fill valve, 3. lift arm, 4. tank fill tube, 5. bowl fill tube, 6. flush valve flapper, 7. overflow tube, 8. flush handle, 9. chain, 10. fill line, 11. fill valve shaft, 12. flush tube|221x221px Basilica Cistern, Istanbul, 138 x 65 meter, 80,000 m3; Justinian I A rain barrel is a form of small cistern The modern toilet utilises a cistern to reserve and hold the correct amount of water required to flush the toilet bowl.