Unterflurhydranten (13795 insgesamt), Schlüssel 'flow_rate'
| Wert | Anzahl |
| 800 l/min | 284 |
| 1000 l/min | 177 |
| 48 m³/h | 93 |
| 1500 l/min | 93 |
| 2000 l/min | 39 |
| 80 | 32 |
| 500 l/min | 26 |
| 100 | 17 |
| 600 | 15 |
| 96 m³/h | 14 |
| 800 | 11 |
| 150 | 10 |
| 800 m³/h | 9 |
| 200 | 4 |
| 300 | 4 |
| 1000 | 3 |
| 3000 l/min | 2 |
| 50 | 2 |
| 800 l | 2 |
| 600 l/min | 2 |
| 630 l/min | 2 |
| 1500 m³/h | 2 |
| 250 | 1 |
| 350 | 1 |
| 80 l/min | 1 |
| 2500 l/min | 1 |
| 30 m³/h | 1 |
| 125 | 1 |
| 225 | 1 |
| 500 | 1 |
| 1200 | 1 |
| 1000 m³/h | 1 |
| 700 l/min | 1 |