Unterflurhydranten (13795 insgesamt)
| Schlüssel | Anzahl |
| emergency | 13795 |
| fire_hydrant:type | 13795 |
| fire_hydrant:diameter | 11960 |
| fire_hydrant:position | 9103 |
| survey:date | 3327 |
| operator | 2312 |
| water_source | 2133 |
| name | 1687 |
| ref | 1670 |
| description | 1512 |
| flow_rate | 854 |
| fire_hydrant:pressure | 706 |
| fire_hydrant:couplings | 692 |
| fire_hydrant:coupling_type | 640 |
| couplings | 601 |
| usability | 576 |
| couplings:type | 280 |
| couplings:diameters | 277 |
| fixme | 275 |
| fire_hydrant:ref | 252 |
| note | 230 |
| fire_hydrant:flow_capacity | 199 |
| fire_hydrant:count | 95 |
| addr:street | 87 |
| addr:housenumber | 68 |
| water_tank:volume | 60 |
| fire_hydrant:style | 19 |
| fire_hydrant:water_source | 18 |
| pillar:type | 13 |
| survey_date | 13 |
| image | 8 |
| fire_hydrant:awwa_class | 5 |
| source | 4 |
| addr:postcode | 4 |
| addr:city | 4 |
| surface | 3 |
| abandoned:aeroway | 3 |
| description:de | 2 |
| image:0 | 2 |
| access | 2 |
| building | 1 |
| highway | 1 |
| fire_hydrant:colour | 1 |
| fire_hydrant:location | 1 |
| noexit | 1 |
| fire_hydrant:housenumber | 1 |
| fire_hydrant:street | 1 |
| addr:country | 1 |
| colour | 1 |