Unterflurhydranten (13795 insgesamt), Schlüssel 'fire_hydrant:diameter'
| Wert | Anzahl |
| 80 | 4049 |
| 100 | 3544 |
| 150 | 1942 |
| 200 | 758 |
| 300 | 336 |
| 125 | 248 |
| 250 | 224 |
| 50 | 204 |
| 90 | 112 |
| 400 | 88 |
| 180 | 64 |
| 110 | 61 |
| 63 | 57 |
| 225 | 51 |
| 160 | 40 |
| 500 | 26 |
| 600 | 24 |
| 65 | 23 |
| 175 | 17 |
| 75 | 13 |
| 40 | 11 |
| 350 | 10 |
| 275 | 10 |
| 800 | 7 |
| 60 | 7 |
| unknown | 4 |
| Hydrant nur nach Einspeisung | 3 |
| 70 | 2 |
| kein Schild | 2 |
| 100 verwachsen | 2 |
| 360 | 2 |
| 80 (Kein Schild) | 2 |
| 1400 | 2 |
| 190 | 1 |
| Kein Schild | 1 |
| 199 | 1 |
| 355 | 1 |
| 100000 Ltr. | 1 |
| 80 (Unter Sand - defekt) | 1 |
| 315 | 1 |
| 200 kein Schild | 1 |
| H 100 | 1 |
| 32 | 1 |
| 15 | 1 |
| Einspeisung | 1 |
| 280 | 1 |
| 0 | 1 |
| 150 kein Schild | 1 |